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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 14 |
| 5 | 107 |
| 6 | 3080 |
| 7 | 328126 |
| 8 | 114236734 |
| 9 | 141361169088 |
| 10 | 565835083485352 |
| 11 | 8280254429732072354 |
| 12 | 401805920591472162735162 |
| 13 | 73001963040583041357650757758 |
| 14 | 44826822610575086782059677501403310 |
| 15 | 104876792026574880566541471182849498480154 |
| 16 | 841219618683014295050378892027503163229521608514 |
[1,1,2,4,14,107,3080,328126,114236734, 141361169088,565835083485352,8280254429732072354, 401805920591472162735162, 73001963040583041357650757758, 44826822610575086782059677501403310, 104876792026574880566541471182849498480154, 841219618683014295050378892027503163229521608514] |