A048815 - OEIS

A048815 as a simple table

n	a(n)
11	1
12	1
13	2
14	3
15	6
16	9
17	17
18	28
19	49
20	83
21	145
22	245
23	425
24	724
25	1246
26	2130
27	3659
28	6254
29	10724
30	18335
31	31396
32	53676
33	91832
34	156944
35	268324
36	458435
37	783324
38	1337862
39	2284950
40	3901211
41	6660304
42	11367935
43	19401130
44	33104598
45	56481086
46	96349147

[1,1,2,3,6,9,17,28,49,83,145,245,425,724,1246, 2130,3659,6254,10724,18335,31396,53676,91832, 156944,268324,458435,783324,1337862,2284950, 3901211,6660304,11367935,19401130,33104598, 56481086,96349147]

[1,1,2,3,6,9,17,28,49,83,145,245,425,724,1246,
 2130,3659,6254,10724,18335,31396,53676,91832,
 156944,268324,458435,783324,1337862,2284950,
 3901211,6660304,11367935,19401130,33104598,
 56481086,96349147]