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A304061 as a simple table

n a(n)
1 0
2 18
3 69
4 661
5 5580
6 48148
7 418382
8 3621421
9 31403562
10 272264465
11 2360282214
12 20463703770
13 177413237112
14 1538129101685
15 13335209986756
16 115612858210884
17 1002335018541953
18 8689994899339220
19 75340094766222961
20 653179905132321132

[0,18,69,661,5580,48148,418382,3621421,31403562,
 272264465,2360282214,20463703770,177413237112,
 1538129101685,13335209986756,115612858210884,
 1002335018541953,8689994899339220,
 75340094766222961,653179905132321132]

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Last modified April 24 12:57 EDT 2024. Contains 371943 sequences. (Running on oeis4.)