A159429 - OEIS

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A159429 as a simple table

n	a(n)
2	6
3	27027
4	36440670
5	74966116950
6	168704668830825
7	358431068326368576
8	634279856099302036782
9	844837725259334008855485
10	779812362283107358262695275
11	469382502756728616090961165185

[6,27027,36440670,74966116950,168704668830825, 358431068326368576,634279856099302036782, 844837725259334008855485, 779812362283107358262695275, 469382502756728616090961165185]