A203054 - OEIS

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A203054 as a simple table

n	a(n)
1	636
2	4078368
3	15517802234
4	50221974160730
5	168179371998322692
6	570286671940304710894
7	1927846292259028240187308
8	6511535556285256453569433756
9	21999909860835890200424895723594

[636,4078368,15517802234,50221974160730, 168179371998322692,570286671940304710894, 1927846292259028240187308, 6511535556285256453569433756, 21999909860835890200424895723594]