A235553 - OEIS

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A235553 as a simple table

n	a(n)
1	660
2	9320
3	184281
4	3824372
5	74362722
6	1271453587
7	19182239308
8	256273383832
9	3086943812776
10	33826465004088
11	341964622301035
12	3210882675698422
13	28280047570300320
14	234710501561552376
15	1848700471390541492

[660,9320,184281,3824372,74362722,1271453587, 19182239308,256273383832,3086943812776, 33826465004088,341964622301035,3210882675698422, 28280047570300320,234710501561552376, 1848700471390541492]