The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 11 |
| 3 | 37 |
| 4 | 371 |
| 5 | 735 |
| 6 | 2463 |
| 7 | 4397 |
| 8 | 91075 |
| 9 | 280123 |
| 10 | 1437381 |
| 11 | 2529811 |
| 12 | 8602103 |
| 13 | -3127477 |
| 14 | 52126151 |
| 15 | 605095485 |
| 16 | 34771603043 |
| 17 | 53033530323 |
| 18 | -118339970967 |
| 19 | -925189527433 |
| 20 | -4874069151427 |
| 21 | 19698401278369 |
| 22 | 210735914741353 |
| 23 | 332611270169019 |
| 24 | -5351278899565017 |
| 25 | -36333411498508817 |
[1,1,11,37,371,735,2463,4397,91075,280123,1437381, 2529811,8602103,-3127477,52126151,605095485, 34771603043,53033530323,-118339970967, -925189527433,-4874069151427,19698401278369, 210735914741353,332611270169019,-5351278899565017, -36333411498508817] |