A299369 - OEIS

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A299369 as a simple table

n	a(n)
1	2
2	64
3	876
4	10692
5	136106
6	1736688
7	22129704
8	281996650
9	3593547434
10	45793495306
11	583557765480
12	7436419337146
13	94764114200356
14	1207602336265708
15	15388772567116042
16	196102900773830988
17	2498987331532782804

[2,64,876,10692,136106,1736688,22129704,281996650, 3593547434,45793495306,583557765480,7436419337146, 94764114200356,1207602336265708,15388772567116042, 196102900773830988,2498987331532782804]