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A177555 as a simple table

n a(n)
0 1
1 1
2 6
3 67
4 1345
5 42540
6 1954681
7 123179785
8 10202958366
9 1075213876195
10 140503060278001
11 22298495343474372
12 4224949686497139601
13 942067522308032112721
14 244201603555824428994486
15 72820161285112813781838787
16 24752401241200431437146873345

[1,1,6,67,1345,42540,1954681,123179785,
 10202958366,1075213876195,140503060278001,
 22298495343474372,4224949686497139601,
 942067522308032112721,244201603555824428994486,
 72820161285112813781838787,
 24752401241200431437146873345]

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Last modified November 30 05:12 EST 2021. Contains 349419 sequences. (Running on oeis4.)