A212927 - OEIS

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A212927 as a simple table

n	a(n)
1	126
2	4431876
3	23124921876
4	85800824609376
5	285912852294921876
6	916111390974365234376
7	2891333179750701904296876
8	9071116924325493011474609376
9	28391912978833403911590576171876

[126,4431876,23124921876,85800824609376, 285912852294921876,916111390974365234376, 2891333179750701904296876, 9071116924325493011474609376, 28391912978833403911590576171876]