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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 11 |
| 5 | 10 |
| 6 | 25 |
| 7 | 406 |
| 8 | 4823 |
| 9 | 15436 |
| 10 | 72915 |
| 11 | 895180 |
| 12 | 11320441 |
| 13 | 71777498 |
| 14 | 519354927 |
| 15 | 6155284240 |
| 16 | 82292879425 |
| 17 | 788821735656 |
| 18 | 7772567489083 |
| 19 | 98329764933354 |
| 20 | 1400924444610675 |
| 21 | 17424772471470490 |
| 22 | 216091776292721021 |
| 23 | 3035845122991962688 |
| 24 | 46700545575567202903 |
[1,0,0,1,11,10,25,406,4823,15436,72915,895180, 11320441,71777498,519354927,6155284240, 82292879425,788821735656,7772567489083, 98329764933354,1400924444610675,17424772471470490, 216091776292721021,3035845122991962688, 46700545575567202903] |