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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 31 |
| 4 | 1150 |
| 5 | 68713 |
| 6 | 5914776 |
| 7 | 692005074 |
| 8 | 105932315154 |
| 9 | 20617891510063 |
| 10 | 4984425649932314 |
| 11 | 1467604324373250545 |
| 12 | 517561005098562714944 |
| 13 | 215501019188749426210440 |
| 14 | 104642607303457024105207408 |
| 15 | 58625315029802441203026824094 |
| 16 | 37541542090285460025870424920666 |
[1,1,2,31,1150,68713,5914776,692005074, 105932315154,20617891510063,4984425649932314, 1467604324373250545,517561005098562714944, 215501019188749426210440, 104642607303457024105207408, 58625315029802441203026824094, 37541542090285460025870424920666] |