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A000641 as a simple table

n a(n)
0 0
1 1
2 2
3 5
4 14
5 39
6 109
7 312
8 890
9 2552
10 7325
11 21047
12 60465
13 173750
14 499068
15 1433071
16 4113105
17 11799780
18 33834367
19 96968462
20 277771344
21 795310628
22 2276055442
23 6510786627
24 18616389094
25 53207964655
26 152014267327
27 434136228215

[0,1,2,5,14,39,109,312,890,2552,7325,21047,60465,
 173750,499068,1433071,4113105,11799780,33834367,
 96968462,277771344,795310628,2276055442,
 6510786627,18616389094,53207964655,152014267327,
 434136228215]

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Last modified March 2 05:08 EST 2024. Contains 370460 sequences. (Running on oeis4.)