A006305 - OEIS

A006305 as a simple table

n	a(n)
0	1
1	2
2	4
3	6
4	10
5	16
6	25
7	38
8	58
9	84
10	122
11	174
12	244
13	338
14	465
15	630
16	850
17	1136
18	1508
19	1988
20	2608
21	3398
22	4408
23	5688
24	7306
25	9342
26	11900
27	15090
28	19070
29	24008
30	30122
31	37666
32	46955
33	58348
34	72302
35	89338
36	110094
37	135316
38	165912
39	202924
40	247632
41	301508

[1,2,4,6,10,16,25,38,58,84,122,174,244,338,465, 630,850,1136,1508,1988,2608,3398,4408,5688,7306, 9342,11900,15090,19070,24008,30122,37666,46955, 58348,72302,89338,110094,135316,165912,202924, 247632,301508]