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A223144 as a simple table

n a(n)
1 1
2 7
3 31
4 187
5 990
6 5721
7 32155
8 185667
9 1068413
10 6209614
11 36152732
12 211488161
13 1240108650
14 7292753853
15 42976317875
16 253780411459
17 1501160467318
18 8893657851979
19 52763660745169
20 313428125418614
21 1863953435747000

[1,7,31,187,990,5721,32155,185667,1068413,6209614,
 36152732,211488161,1240108650,7292753853,
 42976317875,253780411459,1501160467318,
 8893657851979,52763660745169,313428125418614,
 1863953435747000]

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Last modified April 16 05:35 EDT 2024. Contains 371697 sequences. (Running on oeis4.)