n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 6 |
3 | 28 |
4 | 120 |
5 | 497 |
6 | 2016 |
7 | 8140 |
8 | 32640 |
9 | 130813 |
10 | 523776 |
11 | 2096133 |
12 | 8386580 |
13 | 33550335 |
14 | 134209524 |
15 | 536854528 |
16 | 2147450887 |
17 | 8589869054 |
18 | 34359607310 |
19 | 137438691321 |
20 | 549755289604 |
21 | 2199022206975 |
22 | 8796090925052 |
23 | 35184367894531 |
24 | 140737479966709 |
25 | 562949936644106 |
[0,1,6,28,120,497,2016,8140,32640,130813,523776, 2096133,8386580,33550335,134209524,536854528, 2147450887,8589869054,34359607310,137438691321, 549755289604,2199022206975,8796090925052, 35184367894531,140737479966709,562949936644106] |