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A249638 as a simple table

n a(n)
0 0
1 0
2 5
3 45
4 245
5 1305
6 6605
7 33405
8 167405
9 838845
10 4196045
11 20989245
12 104955245
13 524820945
14 2624149445
15 13120970445
16 65605075445
17 328026491505
18 1640133571805
19 8200673428605
20 41003372712605
21 205016891401905
22 1025084484848405
23 5125422563427405

[0,0,5,45,245,1305,6605,33405,167405,838845,
 4196045,20989245,104955245,524820945,2624149445,
 13120970445,65605075445,328026491505,
 1640133571805,8200673428605,41003372712605,
 205016891401905,1025084484848405,5125422563427405]

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Last modified April 19 21:09 EDT 2024. Contains 371798 sequences. (Running on oeis4.)