A252425 - OEIS

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A252425 as a simple table

n	a(n)
1	641
2	688
3	1810
4	7575
5	85563
6	1190037
7	10924203
8	384953455
9	14875741975
10	235391624751
11	26396547463733
12	2950331202467754
13	75986516939085808
14	27838867253853706000
15	9086935218480182872031

[641,688,1810,7575,85563,1190037,10924203, 384953455,14875741975,235391624751,26396547463733, 2950331202467754,75986516939085808, 27838867253853706000,9086935218480182872031]