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A019098 as a simple table

n a(n)
3 0
4 2
5 1
6 5
7 9
8 28
9 35
10 132
11 283
12 638
13 1401
14 3474
15 7299
16 18210
17 41961
18 103620
19 257565
20 654193
21 1653931
22 4354242
23 11252487
24 29935478
25 78691611
26 209601901
27 554402080
28 1475129148
29 3903196658
30 10360651505

[0,2,1,5,9,28,35,132,283,638,1401,3474,7299,18210,
 41961,103620,257565,654193,1653931,4354242,
 11252487,29935478,78691611,209601901,554402080,
 1475129148,3903196658,10360651505]

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Last modified October 1 19:34 EDT 2022. Contains 357164 sequences. (Running on oeis4.)