A239811 - OEIS

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A239811 as a simple table

n	a(n)
1	2
2	23
3	1480
4	510748
5	884977259
6	8243207656791
7	399696014140196630
8	102140919909434198721245
9	136329092264192919129397551406

[2,23,1480,510748,884977259,8243207656791, 399696014140196630,102140919909434198721245, 136329092264192919129397551406]