A046691 - OEIS

A046691 as a simple table

n	a(n)
0	-1
1	2
2	6
3	11
4	17
5	24
6	32
7	41
8	51
9	62
10	74
11	87
12	101
13	116
14	132
15	149
16	167
17	186
18	206
19	227
20	249
21	272
22	296
23	321
24	347
25	374
26	402
27	431
28	461
29	492
30	524
31	557
32	591
33	626
34	662
35	699
36	737
37	776
38	816
39	857
40	899
41	942
42	986
43	1031
44	1077
45	1124
46	1172
47	1221
48	1271
49	1322

[-1,2,6,11,17,24,32,41,51,62,74,87,101,116,132, 149,167,186,206,227,249,272,296,321,347,374,402, 431,461,492,524,557,591,626,662,699,737,776,816, 857,899,942,986,1031,1077,1124,1172,1221,1271, 1322]