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A178936 as a simple table

n a(n)
0 1
1 2
2 6
3 15
4 42
5 116
6 330
7 951
8 2778
9 8180
10 24234
11 72087
12 215034
13 642644
14 1923018
15 5759223
16 17258010
17 51734708
18 155125482
19 465219159
20 1395342906
21 4185399572
22 12554940426
23 37662304695
24 112981880922
25 338935576436
26 1016786596650
27 3050319524631
28 9150878043258

[1,2,6,15,42,116,330,951,2778,8180,24234,72087,
 215034,642644,1923018,5759223,17258010,51734708,
 155125482,465219159,1395342906,4185399572,
 12554940426,37662304695,112981880922,338935576436,
 1016786596650,3050319524631,9150878043258]

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Last modified February 25 22:37 EST 2021. Contains 341618 sequences. (Running on oeis4.)