A371662 - OEIS

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A371662 as a simple table

n	a(n)
0	0
1	0
2	0
3	1
4	2
5	5
6	11
7	26
8	56
9	121
10	255
11	539
12	1123
13	2332
14	4808
15	9891
16	20262
17	41413
18	84411
19	171760
20	348857
21	707593
22	1433315
23	2900313
24	5863023
25	11842460

[0,0,0,1,2,5,11,26,56,121,255,539,1123,2332,4808, 9891,20262,41413,84411,171760,348857,707593, 1433315,2900313,5863023,11842460]