A048813 - OEIS

A048813 as a simple table

n	a(n)
9	1
10	1
11	2
12	3
13	6
14	9
15	17
16	28
17	49
18	82
19	143
20	241
21	417
22	707
23	1213
24	2065
25	3534
26	6014
27	10272
28	17487
29	29820
30	50758
31	86469
32	147123
33	250429
34	425932
35	724517
36	1231765
37	2094116
38	3558799
39	6047447
40	10273349
41	17450221
42	29633832
43	50317376
44	85420630

[1,1,2,3,6,9,17,28,49,82,143,241,417,707,1213, 2065,3534,6014,10272,17487,29820,50758,86469, 147123,250429,425932,724517,1231765,2094116, 3558799,6047447,10273349,17450221,29633832, 50317376,85420630]