登录

A091270型作为一个简单的表

n个a(n)
00
12
25
13
429
561
6125
7253
8509
91021
102045
114093
128189
1316381
1432765
1565533
16131069
17262141
18524285
191048573
202097149
214194301
228388605
2316777213
2433554429
2567108861
26134217725
27268435453
28536870909
291073741821

[0,2,5,13,29,61,125,253,509,1021,2045,4093,8189,16381,32765,65533,131069,262141,524285,1048573,2097149,4194301,8388605,16777213,33554429,67108861,134217725,268435453,536870909,1073741821]