A000064 - OEIS

A000064 as a simple table

n	a(n)
0	1
1	2
2	4
3	6
4	9
5	13
6	18
7	24
8	31
9	39
10	50
11	62
12	77
13	93
14	112
15	134
16	159
17	187
18	218
19	252
20	292
21	335
22	384
23	436
24	494
25	558
26	628
27	704
28	786
29	874
30	972
31	1076
32	1190
33	1310
34	1440
35	1580
36	1730
37	1890
38	2060
39	2240
40	2435
41	2640
42	2860
43	3090
44	3335
45	3595
46	3870
47	4160
48	4465
49	4785
50	5126

[1,2,4,6,9,13,18,24,31,39,50,62,77,93,112,134,159, 187,218,252,292,335,384,436,494,558,628,704,786, 874,972,1076,1190,1310,1440,1580,1730,1890,2060, 2240,2435,2640,2860,3090,3335,3595,3870,4160,4465, 4785,5126]