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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 206276 |
| 3 | 1124101062 |
| 4 | 4106026092896 |
| 5 | 12565214785548390 |
| 6 | 34787981278581970376 |
| 7 | 90353184628933414448862 |
| 8 | 224610989213093282203310816 |
| 9 | 541037084832262355204120965110 |
| 10 | 1272999064631803815296028401200376 |
| 11 | 2942001006486252167427671506502189262 |
[0,0,206276,1124101062,4106026092896, 12565214785548390,34787981278581970376, 90353184628933414448862, 224610989213093282203310816, 541037084832262355204120965110, 1272999064631803815296028401200376, 2942001006486252167427671506502189262] |