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A137775 as a simple table

n a(n)
0 1
1 0
2 3
3 6
4 45
5 252
6 1935
7 16146
8 153657
9 1616760
10 18699579
11 235498590
12 3207570597
13 46968796404
14 735689606535
15 12272343940458
16 217191191400945
17 4064131571557104
18 80166987477918963
19 1662468879466624950

[1,0,3,6,45,252,1935,16146,153657,1616760,
 18699579,235498590,3207570597,46968796404,
 735689606535,12272343940458,217191191400945,
 4064131571557104,80166987477918963,
 1662468879466624950]

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)