A152947 - cp's OEIS frontend

A152947 a(n) = 1 + (n-2)*(n-1)/2.

n	a(n)
1	1
2	1
3	2
4	4
5	7
6	11
7	16
8	22
9	29
10	37
11	46
12	56
13	67
14	79
15	92
16	106
17	121
18	137
19	154
20	172
21	191
22	211
23	232
24	254
25	277
26	301
27	326
28	352
29	379
30	407
31	436
32	466
33	497
34	529
35	562
36	596
37	631
38	667
39	704
40	742
41	781
42	821
43	862
44	904
45	947
46	991
47	1036
48	1082
49	1129
50	1177
51	1226
52	1276
53	1327
54	1379

[1, 1, 2, 4, 7, 11, 16, 22, 29, 37, 46, 56, 67, 79, 92, 106, 121, 137, 154, 172, 191, 211, 232, 254, 277, 301, 326, 352, 379, 407, 436, 466, 497, 529, 562, 596, 631, 667, 704, 742, 781, 821, 862, 904, 947, 991, 1036, 1082, 1129, 1177, 1226, 1276, 1327, 1379]

cp's OEIS Frontend

A152947 a(n) = 1 + (n-2)*(n-1)/2.

Table of values

List of values