A000603 - OEIS

A000603 as a simple table

n	a(n)
0	1
1	3
2	6
3	11
4	17
5	26
6	35
7	45
8	58
9	73
10	90
11	106
12	123
13	146
14	168
15	193
16	216
17	243
18	271
19	302
20	335
21	365
22	402
23	437
24	473
25	516
26	557
27	600
28	642
29	687
30	736
31	782
32	835
33	886
34	941
35	999
36	1050
37	1111
38	1167
39	1234
40	1297
41	1357
42	1424
43	1491
44	1564
45	1636
46	1703
47	1778
48	1852
49	1931
50	2012
51	2095

[1,3,6,11,17,26,35,45,58,73,90,106,123,146,168, 193,216,243,271,302,335,365,402,437,473,516,557, 600,642,687,736,782,835,886,941,999,1050,1111, 1167,1234,1297,1357,1424,1491,1564,1636,1703,1778, 1852,1931,2012,2095]