A226011 - OEIS

A226011 as a simple table

n	a(n)
1	1
2	2
3	4
4	18
5	72
6	130
7	280
8	495
9	840
10	900
11	930
12	1216
13	1880
14	2646
15	3182
16	3762
17	17437
18	21600
19	29400
20	30654
21	35207
22	45024
23	58230
24	266133
25	1051980
26	1204164
27	1204320
28	2193408
29	2494520
30	2549745
31	3272178
32	3671570
33	3843378
34	5166708
35	5398785
36	8709805
37	8922270
38	8922480

[1,2,4,18,72,130,280,495,840,900,930,1216,1880, 2646,3182,3762,17437,21600,29400,30654,35207, 45024,58230,266133,1051980,1204164,1204320, 2193408,2494520,2549745,3272178,3671570,3843378, 5166708,5398785,8709805,8922270,8922480]