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A012258 as a simple table

n a(n)
0 1
1 1
2 1
3 4
4 13
5 84
6 469
7 4152
8 32985
9 370128
10 3818601
11 51861888
12 658371429
13 10494283968
14 158197312701
15 2894815734912
16 50529852678321
17 1043916757274880
18 20707179214389201
19 476720372375608320

[1,1,1,4,13,84,469,4152,32985,370128,3818601,
 51861888,658371429,10494283968,158197312701,
 2894815734912,50529852678321,1043916757274880,
 20707179214389201,476720372375608320]

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Last modified June 16 21:13 EDT 2019. Contains 324155 sequences. (Running on oeis4.)