A123908 - OEIS

A123908 as a simple table

n	a(n)
0	1
1	1
2	2
3	3
4	6
5	10
6	17
7	30
8	52
9	90
10	156
11	271
12	470
13	815
14	1414
15	2453
16	4255
17	7381
18	12804
19	22211
20	38529
21	66836
22	115940
23	201120
24	348881
25	605201
26	1049837
27	1821143
28	3159121
29	5480100
30	9506282
31	16490465
32	28605867
33	49622350
34	86079461
35	149321296

[1,1,2,3,6,10,17,30,52,90,156,271,470,815,1414, 2453,4255,7381,12804,22211,38529,66836,115940, 201120,348881,605201,1049837,1821143,3159121, 5480100,9506282,16490465,28605867,49622350, 86079461,149321296]