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A013449 as a simple table

n a(n)
0 1
1 0
2 0
3 1
4 0
5 15
6 10
7 271
8 840
9 8215
10 60870
11 423091
12 4980580
13 35126715
14 501501130
15 4192844111
16 63445348720
17 652228720015
18 10063325322190
19 125163350892331
20 1976669210391260
21 28804173376146115

[1,0,0,1,0,15,10,271,840,8215,60870,423091,
 4980580,35126715,501501130,4192844111,63445348720,
 652228720015,10063325322190,125163350892331,
 1976669210391260,28804173376146115]

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Last modified May 28 07:06 EDT 2022. Contains 354112 sequences. (Running on oeis4.)