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A156825 as a simple table

n a(n)
0 1
1 1
2 1
3 1
4 6
5 31
6 1
7 27
8 598
9 12714
10 1
11 112
12 10118
13 872744
14 74451015
15 1
16 453
17 164591
18 56998275
19 19510862790
20 6659538174846
21 1
22 1818
23 2646161
24 3669008040
25 5027706837390
26 6869479371212196
27 9379110782727354118
28 1
29 7279
30 42396780

[1,1,1,1,6,31,1,27,598,12714,1,112,10118,872744,
 74451015,1,453,164591,56998275,19510862790,
 6659538174846,1,1818,2646161,3669008040,
 5027706837390,6869479371212196,
 9379110782727354118,1,7279,42396780]

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Last modified January 18 15:35 EST 2021. Contains 340254 sequences. (Running on oeis4.)