The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 4 |
| 5 | 1 |
| 6 | 1 |
| 7 | 12 |
| 8 | 12 |
| 9 | 1 |
| 10 | 1 |
| 11 | 68 |
| 12 | 134 |
| 13 | 68 |
| 14 | 1 |
| 15 | 1 |
| 16 | 630 |
| 17 | 1885 |
| 18 | 1885 |
| 19 | 630 |
| 20 | 1 |
| 21 | 1 |
| 22 | 7782 |
| 23 | 31119 |
| 24 | 46676 |
| 25 | 31119 |
| 26 | 7782 |
| 27 | 1 |
| 28 | 1 |
| 29 | 117656 |
| 30 | 588266 |
| 31 | 1176525 |
| 32 | 1176525 |
| 33 | 588266 |
| 34 | 117656 |
| 35 | 1 |
| 36 | 1 |
| 37 | 2097160 |
| 38 | 12582940 |
| 39 | 31457336 |
| 40 | 41943110 |
| 41 | 31457336 |
| 42 | 12582940 |
| 43 | 2097160 |
| 44 | 1 |
[1,1,1,1,4,1,1,12,12,1,1,68,134,68,1,1,630,1885, 1885,630,1,1,7782,31119,46676,31119,7782,1,1, 117656,588266,1176525,1176525,588266,117656,1,1, 2097160,12582940,31457336,41943110,31457336, 12582940,2097160,1] |