A106357 - OEIS

A106357 as a simple table

n	a(n)
2	1
3	0
4	3
5	6
6	7
7	20
8	42
9	72
10	141
11	280
12	516
13	976
14	1853
15	3420
16	6361
17	11844
18	21819
19	40192
20	73942
21	135452
22	247828
23	452776
24	825252
25	1501998
26	2730159
27	4954890
28	8981360
29	16261568
30	29408708
31	53130154
32	95894384
33	172917788
34	311538169
35	560831286

[1,0,3,6,7,20,42,72,141,280,516,976,1853,3420, 6361,11844,21819,40192,73942,135452,247828,452776, 825252,1501998,2730159,4954890,8981360,16261568, 29408708,53130154,95894384,172917788,311538169, 560831286]