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A180775 as a simple table

n a(n)
1 0
2 1
3 3
4 34
5 145
6 522
7 1518
8 4041
9 9150
10 19970
11 38555
12 74370
13 128040
14 224434
15 358988
16 587014
17 876114
18 1372578
19 1941624
20 2912816
21 4001868
22 5742391
23 7599933
24 10831065
25 13788935
26 18946564
27 24080514
28 32270596
29 39619720
30 53256875
31 63655605
32 83580675

[0,1,3,34,145,522,1518,4041,9150,19970,38555,
 74370,128040,224434,358988,587014,876114,1372578,
 1941624,2912816,4001868,5742391,7599933,10831065,
 13788935,18946564,24080514,32270596,39619720,
 53256875,63655605,83580675]

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Last modified July 1 20:10 EDT 2022. Contains 354975 sequences. (Running on oeis4.)