A263659 - OEIS

A263659 as a simple table

n	a(n)
0	0
1	2
2	2
3	2
4	3
5	4
6	5
7	6
8	8
9	10
10	15
11	20
12	31
13	42
14	64
15	94
16	143
17	212
18	329
19	494
20	766
21	1170
22	1811
23	2788
24	4341
25	6714
26	10462
27	16274
28	25415
29	39652
30	62075
31	97110
32	152288
33	238838
34	375167
35	589528
36	927555
37	1459962
38	2300348
39	3626242
40	5721045

[0,2,2,2,3,4,5,6,8,10,15,20,31,42,64,94,143,212, 329,494,766,1170,1811,2788,4341,6714,10462,16274, 25415,39652,62075,97110,152288,238838,375167, 589528,927555,1459962,2300348,3626242,5721045]