A055469 - cp's OEIS frontend

A055469 Primes of the form k(k+1)/2+1 (i.e., central polygonal numbers, or one more than triangular numbers).

n	a(n)
1	2
2	7
3	11
4	29
5	37
6	67
7	79
8	137
9	191
10	211
11	277
12	379
13	631
14	821
15	947
16	991
17	1129
18	1327
19	1597
20	1831
21	2017
22	2081
23	2347
24	2557
25	2851
26	2927
27	3571
28	3917
29	4561
30	4657
31	4951
32	5051
33	5779
34	6217
35	6329
36	8647
37	8779
38	9181
39	9871
40	11027
41	12721
42	13367
43	14029
44	14197
45	14879

[2, 7, 11, 29, 37, 67, 79, 137, 191, 211, 277, 379, 631, 821, 947, 991, 1129, 1327, 1597, 1831, 2017, 2081, 2347, 2557, 2851, 2927, 3571, 3917, 4561, 4657, 4951, 5051, 5779, 6217, 6329, 8647, 8779, 9181, 9871, 11027, 12721, 13367, 14029, 14197, 14879]

cp's OEIS Frontend

A055469 Primes of the form k(k+1)/2+1 (i.e., central polygonal numbers, or one more than triangular numbers).

Table of values

List of values