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A166415 as a simple table

n a(n)
0 1
1 21
2 420
3 8400
4 168000
5 3360000
6 67200000
7 1344000000
8 26880000000
9 537600000000
10 10752000000000
11 215039999999790
12 4300799999991600
13 86015999999748210
14 1720319999993288400
15 34406399999832252000

[1,21,420,8400,168000,3360000,67200000,1344000000,
 26880000000,537600000000,10752000000000,
 215039999999790,4300799999991600,
 86015999999748210,1720319999993288400,
 34406399999832252000]

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Last modified April 16 04:17 EDT 2024. Contains 371696 sequences. (Running on oeis4.)