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A121690 as a simple table

n a(n)
0 1
1 1
2 2
3 4
4 10
5 27
6 81
7 262
8 910
9 3363
10 13150
11 54135
12 233671
13 1053911
14 4951997
15 24177536
16 122381035
17 640937746
18 3466900453
19 19337255086
20 111057640382
21 655892813805
22 3978591077096
23 24760700544301
24 157941950878839

[1,1,2,4,10,27,81,262,910,3363,13150,54135,233671,
 1053911,4951997,24177536,122381035,640937746,
 3466900453,19337255086,111057640382,655892813805,
 3978591077096,24760700544301,157941950878839]

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Last modified May 13 02:41 EDT 2024. Contains 372497 sequences. (Running on oeis4.)