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A130495 as a simple table

n a(n)
0 1
1 1
2 2
3 8
4 24
5 72
6 264
7 952
8 3352
9 11960
10 43656
11 160840
12 594568
13 2215480
14 8300056
15 31191480
16 117674504
17 445439944
18 1691011464
19 6437425720
20 24564925848
21 93937631544
22 359943235080
23 1381706541512
24 5312678458888
25 20458827990456
26 78898261863832
27 304666752525368

[1,1,2,8,24,72,264,952,3352,11960,43656,160840,
 594568,2215480,8300056,31191480,117674504,
 445439944,1691011464,6437425720,24564925848,
 93937631544,359943235080,1381706541512,
 5312678458888,20458827990456,78898261863832,
 304666752525368]

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Last modified June 21 19:12 EDT 2021. Contains 345365 sequences. (Running on oeis4.)