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A130463 as a simple table

n a(n)
0 1
1 1
2 3
3 7
4 25
5 75
6 275
7 927
8 3438
9 12306
10 46131
11 170695
12 646399
13 2439582
14 9321149
15 35629281
16 137156187
17 528893353
18 2048588717
19 7950709147
20 30951860693
21 120722736668
22 471927571577
23 1847953114948
24 7248961671334
25 28476897249963

[1,1,3,7,25,75,275,927,3438,12306,46131,170695,
 646399,2439582,9321149,35629281,137156187,
 528893353,2048588717,7950709147,30951860693,
 120722736668,471927571577,1847953114948,
 7248961671334,28476897249963]

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Last modified July 29 16:28 EDT 2024. Contains 374734 sequences. (Running on oeis4.)