A089647 - OEIS

A089647 as a simple table

n	a(n)
0	1
1	1
2	1
3	2
4	2
5	4
6	6
7	8
8	12
9	18
10	26
11	37
12	54
13	76
14	111
15	156
16	221
17	310
18	438
19	608
20	850
21	1178
22	1633
23	2251
24	3104
25	4257
26	5837
27	7972
28	10866
29	14772
30	20042
31	27121
32	36625
33	49356
34	66366
35	89077
36	119319
37	159547
38	212942
39	283753
40	377423
41	501274
42	664639
43	879963

[1,1,1,2,2,4,6,8,12,18,26,37,54,76,111,156,221, 310,438,608,850,1178,1633,2251,3104,4257,5837, 7972,10866,14772,20042,27121,36625,49356,66366, 89077,119319,159547,212942,283753,377423,501274, 664639,879963]