A001307 - OEIS

A001307 as a simple table

n	a(n)
0	1
1	2
2	4
3	6
4	10
5	14
6	20
7	26
8	35
9	44
10	57
11	70
12	88
13	106
14	130
15	154
16	185
17	216
18	255
19	294
20	344
21	394
22	456
23	518
24	595
25	672
26	765
27	858
28	970
29	1082
30	1216
31	1350
32	1509
33	1668
34	1855
35	2042
36	2260
37	2478
38	2730
39	2982
40	3274
41	3566
42	3901
43	4236
44	4620
45	5004
46	5440
47	5876
48	6370
49	6864

[1,2,4,6,10,14,20,26,35,44,57,70,88,106,130,154, 185,216,255,294,344,394,456,518,595,672,765,858, 970,1082,1216,1350,1509,1668,1855,2042,2260,2478, 2730,2982,3274,3566,3901,4236,4620,5004,5440,5876, 6370,6864]