A048811 - OEIS

A048811 as a simple table

n	a(n)
7	1
8	1
9	2
10	3
11	6
12	9
13	17
14	27
15	47
16	78
17	135
18	224
19	384
20	642
21	1088
22	1827
23	3088
24	5182
25	8736
26	14661
27	24660
28	41378
29	69500
30	116534
31	195509
32	327627
33	549104
34	919593
35	1539985
36	2577399
37	4313102
38	7214374
39	12064930
40	20169283
41	33710370
42	56324729
43	94089240

[1,1,2,3,6,9,17,27,47,78,135,224,384,642,1088, 1827,3088,5182,8736,14661,24660,41378,69500, 116534,195509,327627,549104,919593,1539985, 2577399,4313102,7214374,12064930,20169283, 33710370,56324729,94089240]