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A002890 as a simple table

n a(n)
0 1
1 0
2 1
3 2
4 5
5 14
6 44
7 152
8 566
9 2234
10 9228
11 39520
12 174271
13 787246
14 3628992
15 17019374
16 81011889
17 390633382
18 1905134695
19 9385453576
20 46653815395
21 233788460256
22 1180111379105
23 5996452414310
24 30653752894948

[1,0,1,2,5,14,44,152,566,2234,9228,39520,174271,
 787246,3628992,17019374,81011889,390633382,
 1905134695,9385453576,46653815395,233788460256,
 1180111379105,5996452414310,30653752894948]

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Last modified April 23 18:16 EDT 2024. Contains 371916 sequences. (Running on oeis4.)