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A357703 as a simple table

n a(n)
0 1
1 0
2 3
3 9
4 42
5 240
6 1614
7 12474
8 108900
9 1059696
10 11371932
11 133410420
12 1698541416
13 23324023008
14 343606235544
15 5405580540360
16 90445832210448
17 1603781918563968
18 30042007763367600
19 592788643008571152
20 12289695299276133024
21 267079782474700715520

[1,0,3,9,42,240,1614,12474,108900,1059696,
 11371932,133410420,1698541416,23324023008,
 343606235544,5405580540360,90445832210448,
 1603781918563968,30042007763367600,
 592788643008571152,12289695299276133024,
 267079782474700715520]

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Last modified July 13 04:46 EDT 2024. Contains 374267 sequences. (Running on oeis4.)