A068623 - OEIS

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A068623 as a simple table

n	a(n)
1	8
2	28
3	528
4	18528
5	184528
6	18045028
7	1800450028
8	180004500028
9	18000045000028
10	1800000450000028
11	180000004500000028
12	18000000045000000028
13	1800000000450000000028
14	180000000004500000000028

[8,28,528,18528,184528,18045028,1800450028, 180004500028,18000045000028,1800000450000028, 180000004500000028,18000000045000000028, 1800000000450000000028,180000000004500000000028]