A206518 - OEIS

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A206518 as a simple table

n	a(n)
1	697369
2	2830665213
3	11507555684346
4	46782397564239329
5	190187445308482279868
6	773181099472666620872437
7	3143262221646752596264102690
8	12778503510703479899595167222949

[697369,2830665213,11507555684346, 46782397564239329,190187445308482279868, 773181099472666620872437, 3143262221646752596264102690, 12778503510703479899595167222949]