A234663 - OEIS

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A234663 as a simple table

n	a(n)
1	417050
2	1566596
3	5969944
4	23814574
5	96408730
6	406314140
7	1736939430
8	7695605586
9	34563948112
10	160286890226
11	753070652682
12	3641338746212
13	17827388594990
14	89569410664562
15	455342474969544
16	2369222376651354

[417050,1566596,5969944,23814574,96408730, 406314140,1736939430,7695605586,34563948112, 160286890226,753070652682,3641338746212, 17827388594990,89569410664562,455342474969544, 2369222376651354]