n | a(n) |
---|---|
2 | 6 |
3 | 20 |
4 | 72 |
5 | 272 |
6 | 1056 |
7 | 4160 |
8 | 16512 |
9 | 65792 |
10 | 262656 |
11 | 1049600 |
12 | 4196352 |
13 | 16781312 |
14 | 67117056 |
15 | 268451840 |
16 | 1073774592 |
17 | 4295032832 |
18 | 17180000256 |
19 | 68719738880 |
20 | 274878431232 |
21 | 1099512676352 |
22 | 4398048608256 |
23 | 17592190238720 |
24 | 70368752566272 |
25 | 281474993487872 |
26 | 1125899940397056 |
[6,20,72,272,1056,4160,16512,65792,262656,1049600, 4196352,16781312,67117056,268451840,1073774592, 4295032832,17180000256,68719738880,274878431232, 1099512676352,4398048608256,17592190238720, 70368752566272,281474993487872,1125899940397056] |