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A218722 as a simple table

n a(n)
0 0
1 1
2 20
3 381
4 7240
5 137561
6 2613660
7 49659541
8 943531280
9 17927094321
10 340614792100
11 6471681049901
12 122961939948120
13 2336276859014281
14 44389260321271340
15 843395946104155461
16 16024522975978953760
17 304465936543600121441

[0,1,20,381,7240,137561,2613660,49659541,
 943531280,17927094321,340614792100,6471681049901,
 122961939948120,2336276859014281,
 44389260321271340,843395946104155461,
 16024522975978953760,304465936543600121441]

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Last modified May 31 01:18 EDT 2024. Contains 372980 sequences. (Running on oeis4.)