A152478 - OEIS

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A152478 as a simple table

n	a(n)
1	0
2	1
3	2
4	3
5	5
6	8
7	14
8	32
9	108
10	620
11	6998
12	180680
13	12950282
14	3341374218
15	4341810374424
16	43852571179147329
17	5999233370012268208703
18	22578209776617142730549141113
19	5759108920458153526111129552362859699

[0,1,2,3,5,8,14,32,108,620,6998,180680,12950282, 3341374218,4341810374424,43852571179147329, 5999233370012268208703, 22578209776617142730549141113, 5759108920458153526111129552362859699]