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A019127 as a simple table

n a(n)
3 0
4 1
5 4
6 0
7 10
8 32
9 42
10 84
11 258
12 581
13 1186
14 3035
15 7988
16 18756
17 47742
18 127617
19 326076
20 846845
21 2256500
22 5951285
23 15714222
24 41838100
25 111313502
26 295853946
27 788065292
28 2101159887
29 5601851162
30 14949652726

[0,1,4,0,10,32,42,84,258,581,1186,3035,7988,18756,
 47742,127617,326076,846845,2256500,5951285,
 15714222,41838100,111313502,295853946,788065292,
 2101159887,5601851162,14949652726]

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Last modified July 1 07:17 EDT 2022. Contains 354952 sequences. (Running on oeis4.)