A152950 - cp's OEIS frontend

A152950 a(n) = 3 + n*(n-1)/2.

n	a(n)
1	3
2	4
3	6
4	9
5	13
6	18
7	24
8	31
9	39
10	48
11	58
12	69
13	81
14	94
15	108
16	123
17	139
18	156
19	174
20	193
21	213
22	234
23	256
24	279
25	303
26	328
27	354
28	381
29	409
30	438
31	468
32	499
33	531
34	564
35	598
36	633
37	669
38	706
39	744
40	783
41	823
42	864
43	906
44	949
45	993
46	1038
47	1084
48	1131
49	1179
50	1228
51	1278
52	1329
53	1381
54	1434
55	1488

[3, 4, 6, 9, 13, 18, 24, 31, 39, 48, 58, 69, 81, 94, 108, 123, 139, 156, 174, 193, 213, 234, 256, 279, 303, 328, 354, 381, 409, 438, 468, 499, 531, 564, 598, 633, 669, 706, 744, 783, 823, 864, 906, 949, 993, 1038, 1084, 1131, 1179, 1228, 1278, 1329, 1381, 1434, 1488]

cp's OEIS Frontend

A152950 a(n) = 3 + n*(n-1)/2.

Table of values

List of values