A172945 - OEIS

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A172945 as a simple table

n	a(n)
1	1
2	3139
3	19546975
4	171475190227
5	1846780916614531
6	22800663583664571781
7	310323674631037864285609
8	4543765474410728783088589075
9	70413374705157290394475959841507
10	1141793131372748920690525916472692809

[1,3139,19546975,171475190227,1846780916614531, 22800663583664571781,310323674631037864285609, 4543765474410728783088589075, 70413374705157290394475959841507, 1141793131372748920690525916472692809]