The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 840 |
| 4 | 771305 |
| 5 | 1496866413 |
| 6 | 5261551562405 |
| 7 | 29862266595102105 |
| 8 | 256001890048602731140 |
| 9 | 3158251998655622915889925 |
| 10 | 53980217006281640348184149417 |
| 11 | 1239061499733946652592749224572554 |
| 12 | 37220984154655168600230783138660824904 |
| 13 | 1431711029036285286788945015739877116840914 |
[1,0,0,840,771305,1496866413,5261551562405, 29862266595102105,256001890048602731140, 3158251998655622915889925, 53980217006281640348184149417, 1239061499733946652592749224572554, 37220984154655168600230783138660824904, 1431711029036285286788945015739877116840914] |