A223432 - OEIS

A223432 as a simple table

n	a(n)
1	15
2	40
3	40
4	120
5	248
6	120
7	356
8	1648
9	1648
10	356
11	1088
12	11168
13	25436
14	11168
15	1088
16	3276
17	76384
18	394736
19	394736
20	76384
21	3276
22	10052
23	524736
24	6256832
25	14270468
26	6256832
27	524736
28	10052
29	30380
30	3613024
31	98783592
32	522011152
33	522011152
34	98783592

[15,40,40,120,248,120,356,1648,1648,356,1088, 11168,25436,11168,1088,3276,76384,394736,394736, 76384,3276,10052,524736,6256832,14270468,6256832, 524736,10052,30380,3613024,98783592,522011152, 522011152,98783592]