A173800 - OEIS

A173800 as a simple table

n	a(n)
1	1
2	4
3	13
4	10
5	40
6	121
7	28
8	91
9	364
10	1093
11	82
12	328
13	820
14	3280
15	757
16	9841
17	244
18	7381
19	29524
20	88573
21	730
22	949
23	2920
24	6643
25	9490
26	20440
27	26572
28	66430
29	265720
30	797161
31	2188
32	597871
33	2391484
34	59293
35	551881
36	7174453
37	6562
38	26248
39	65620
40	253216

[1,4,13,10,40,121,28,91,364,1093,82,328,820,3280, 757,9841,244,7381,29524,88573,730,949,2920,6643, 9490,20440,26572,66430,265720,797161,2188,597871, 2391484,59293,551881,7174453,6562,26248,65620, 253216]