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A215730
as a simple table
n
a(n)
1
0
2
6
3
31
4
71
5
172
6
175
7
1961
8
6176
9
33836
10
61282
11
305871
12
856635
13
2135396
14
7291510
15
11032874
16
30775389
[0,6,31,71,172,175,1961,6176,33836,61282,305871, 856635,2135396,7291510,11032874,30775389]