A019093 - OEIS

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A019093 as a simple table

n	a(n)
3	0
4	1
5	1
6	5
7	2
8	9
9	7
10	51
11	54
12	269
13	383
14	1360
15	2299
16	7403
17	12992
18	38816
19	73818
20	211988
21	429604
22	1191119
23	2553132
24	6896573
25	15364578
26	40672718
27	93190816
28	243089890
29	569243543
30	1469455978
31	3500449951

[0,1,1,5,2,9,7,51,54,269,383,1360,2299,7403,12992, 38816,73818,211988,429604,1191119,2553132,6896573, 15364578,40672718,93190816,243089890,569243543, 1469455978,3500449951]