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A109501 as a simple table

n a(n)
0 1
1 0
2 6
3 30
4 186
5 1110
6 6666
7 39990
8 239946
9 1439670
10 8638026
11 51828150
12 310968906
13 1865813430
14 11194880586
15 67169283510
16 403015701066
17 2418094206390
18 14508565238346
19 87051391430070
20 522308348580426

[1,0,6,30,186,1110,6666,39990,239946,1439670,
 8638026,51828150,310968906,1865813430,11194880586,
 67169283510,403015701066,2418094206390,
 14508565238346,87051391430070,522308348580426]

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)