A133230 - OEIS

A133230 as a simple table

n	a(n)
0	-1
1	2
2	8
3	15
4	22
5	31
6	41
7	53
8	63
9	77
10	90
11	105
12	123
13	138
14	157
15	175
16	194
17	215
18	237
19	259
20	281
21	306
22	330
23	355
24	382
25	410
26	437
27	468
28	498
29	527
30	558
31	588
32	623
33	656
34	689
35	727
36	762
37	797
38	836
39	872
40	911
41	952
42	992
43	1033
44	1076
45	1119
46	1161
47	1205
48	1249
49	1294
50	1341
51	1390
52	1434
53	1483
54	1534
55	1585
56	1634
57	1687
58	1738
59	1791
60	1842
61	1898

[-1,2,8,15,22,31,41,53,63,77,90,105,123,138,157, 175,194,215,237,259,281,306,330,355,382,410,437, 468,498,527,558,588,623,656,689,727,762,797,836, 872,911,952,992,1033,1076,1119,1161,1205,1249, 1294,1341,1390,1434,1483,1534,1585,1634,1687,1738, 1791,1842,1898]