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A328689 as a simple table

n a(n)
1 0
2 0
3 0
4 2
5 5
6 21
7 42
8 122
9 225
10 570
11 990
12 2321
13 3913
14 8827
15 14480
16 31802
17 51425
18 110928
19 177270
20 377722
21 598437
22 1264307
23 1990098
24 4175201
25 6540605
26 13653822
27 21301740
28 44288071
29 68877929
30 142736091
31 221392266
32 457560122
33 708106245
34 1460194770
35 2255365152
36 4641851924

[0,0,0,2,5,21,42,122,225,570,990,2321,3913,8827,
 14480,31802,51425,110928,177270,377722,598437,
 1264307,1990098,4175201,6540605,13653822,21301740,
 44288071,68877929,142736091,221392266,457560122,
 708106245,1460194770,2255365152,4641851924]

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Last modified June 16 19:05 EDT 2021. Contains 345068 sequences. (Running on oeis4.)