n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 27 |
3 | 119 |
4 | 495 |
5 | 2015 |
6 | 8127 |
7 | 32639 |
8 | 130815 |
9 | 523775 |
10 | 2096127 |
11 | 8386559 |
12 | 33550335 |
13 | 134209535 |
14 | 536854527 |
15 | 2147450879 |
16 | 8589869055 |
17 | 34359607295 |
18 | 137438691327 |
19 | 549755289599 |
20 | 2199022206975 |
21 | 8796090925055 |
22 | 35184367894527 |
23 | 140737479966719 |
24 | 562949936644095 |
[1,4,27,119,495,2015,8127,32639,130815,523775, 2096127,8386559,33550335,134209535,536854527, 2147450879,8589869055,34359607295,137438691327, 549755289599,2199022206975,8796090925055, 35184367894527,140737479966719,562949936644095] |