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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 1 |
| 9 | 8 |
| 10 | 47 |
| 11 | 277 |
| 12 | 1775 |
| 13 | 12616 |
| 14 | 102445 |
| 15 | 957357 |
| 16 | 10174566 |
| 17 | 119235347 |
| 18 | 1482297912 |
| 19 | 18884450721 |
| 20 | 240477821389 |
| 21 | 3012879828566 |
| 22 | 36800049400028 |
| 23 | 436068618826236 |
| 24 | 5001537857507095 |
| 25 | 55482177298724426 |
| 26 | 595303034603214108 |
| 27 | 6181562837200509792 |
| 28 | 62170512250565592346 |
[0,0,0,0,0,0,0,1,8,47,277,1775,12616,102445, 957357,10174566,119235347,1482297912,18884450721, 240477821389,3012879828566,36800049400028, 436068618826236,5001537857507095, 55482177298724426,595303034603214108, 6181562837200509792,62170512250565592346] |