20 = 1
21 = 2
22 = 4
23 = 8
24 = 16
25 = 32
26 = 64
27 = 128
28 = 256
29 = 512
210 = 1024
211 = 2048
212 = 4096
213 = 8192
214 = 16384
215 = 32768
216 = 65536
217 = 131072
218 = 262144
219 = 524288
220 = 1048576
221 = 2097152
222 = 4194304
223 = 8388608
224 = 16777216
225 = 33554432
226 = 67108864
227 = 134217728
228 = 268435456
229 = 536870912
230 = 1073741824
231 = 2147483648
232 = 4294967296
233 = 8589934592
234 = 17179869184
235 = 34359738368
236 = 68719476736
237 = 137438953472
238 = 274877906944
239 = 549755813888
240 = 1099511627776
241 = 2199023255552
242 = 4398046511104
243 = 8796093022208
244 = 17592186044416
245 = 35184372088832
246 = 70368744177664
247 = 140737488355328
248 = 281474976710656
249 = 562949953421312
250 = 1125899906842624
251 = 2251799813685248
252 = 4503599627370496
253 = 9007199254740992
254 = 18014398509481984
255 = 36028797018963968
256 = 72057594037927936
257 = 144115188075855872
258 = 288230376151711744
259 = 576460752303423488
260 = 1152921504606846976
261 = 2305843009213693952
262 = 4611686018427387904
263 = 9223372036854775808
264 = 18446744073709551616
265 = 36893488147419103232
266 = 73786976294838206464
267 = 147573952589676412928
268 = 295147905179352825856
269 = 590295810358705651712
270 = 1180591620717411303424
271 = 2361183241434822606848
272 = 4722366482869645213696
273 = 9444732965739290427392
274 = 18889465931478580854784
275 = 37778931862957161709568
276 = 75557863725914323419136
277 = 151115727451828646838272
278 = 302231454903657293676544
279 = 604462909807314587353088
280 = 1208925819614629174706176
281 = 2417851639229258349412352
282 = 4835703278458516698824704
283 = 9671406556917033397649408
284 = 19342813113834066795298816
285 = 38685626227668133590597632
286 = 77371252455336267181195264
287 = 154742504910672534362390528
288 = 309485009821345068724781056
289 = 618970019642690137449562112
290 = 1237940039285380274899124224
291 = 2475880078570760549798248448
292 = 4951760157141521099596496896
293 = 9903520314283042199192993792
294 = 19807040628566084398385987584
295 = 39614081257132168796771975168
296 = 79228162514264337593543950336
297 = 158456325028528675187087900672
298 = 316912650057057350374175801344
299 = 633825300114114700748351602688
2100 = 1267650600228229401496703205376

前1000項亦可參考OEIS的A000079

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