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A203156 as a simple table

n a(n)
1 1
2 13
3 244
4 6676
5 254736
6 13000464
7 857431296
8 71077637376
9 7239445632000
10 889141110912000
11 129629670893568000
12 22136856913815552000
13 4377599743151480832000
14 992559996665635184640000
15 255805371399126806691840000

[1,13,244,6676,254736,13000464,857431296,
 71077637376,7239445632000,889141110912000,
 129629670893568000,22136856913815552000,
 4377599743151480832000,992559996665635184640000,
 255805371399126806691840000]

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Last modified February 7 15:20 EST 2023. Contains 360127 sequences. (Running on oeis4.)