A252072 - OEIS

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A252072 as a simple table

n	a(n)
1	767
2	3029
3	17455
4	92225
5	480464
6	2547765
7	13460641
8	71027923
9	375675345
10	1985308056
11	10482759501
12	55378851635
13	292644335776
14	1546162330278
15	8168095347950
16	43152835319630
17	227991513370743
18	1204546728063178

[767,3029,17455,92225,480464,2547765,13460641, 71027923,375675345,1985308056,10482759501, 55378851635,292644335776,1546162330278, 8168095347950,43152835319630,227991513370743, 1204546728063178]