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A013319 as a simple table

n a(n)
0 1
1 0
2 1
3 6
4 17
5 40
6 217
7 1358
8 6449
9 29712
10 182049
11 1270390
12 8227617
13 52843960
14 383647513
15 3038764542
16 23995450017
17 191131924256
18 1621685573121
19 14574192364646
20 133472613190001
21 1244028051397192
22 12068806481240601

[1,0,1,6,17,40,217,1358,6449,29712,182049,1270390,
 8227617,52843960,383647513,3038764542,23995450017,
 191131924256,1621685573121,14574192364646,
 133472613190001,1244028051397192,
 12068806481240601]

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Last modified June 2 21:38 EDT 2024. Contains 373051 sequences. (Running on oeis4.)