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A000458 as a simple table

n a(n)
0 1
1 1
2 2
3 4
4 10
5 25
6 49
7 88
8 237
9 500
10 1412
11 3570
12 12846
13 36072
14 126504
15 493920
16 2358720
17 12292224
18 49984224
19 171237888
20 642804078
21 1980490350
22 6380883000
23 27032104440
24 117961599600
25 555861355920
26 2623445776224

[1,1,2,4,10,25,49,88,237,500,1412,3570,12846,
 36072,126504,493920,2358720,12292224,49984224,
 171237888,642804078,1980490350,6380883000,
 27032104440,117961599600,555861355920,
 2623445776224]

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Last modified May 14 05:21 EDT 2024. Contains 372528 sequences. (Running on oeis4.)