A145043 - cp's OEIS frontend

A145043 Primes p for which s=2 is the least positive integer such that sp-t(sp) is a triangular number, where t(n) is the maximal triangular number not exceeding n.

n	a(n)
1	5
2	17
3	23
4	47
5	53
6	71
7	73
8	127
9	173
10	233
11	251
12	269
13	281
14	347
15	353
16	359
17	431
18	487
19	491
20	509
21	541
22	563
23	569
24	593
25	613
26	677
27	743
28	773
29	827
30	857
31	863
32	883
33	929
34	953
35	977
36	1013
37	1153
38	1187
39	1283
40	1319
41	1361
42	1373
43	1439
44	1481
45	1583
46	1613
47	1619
48	1709
49	1871
50	1997

[5, 17, 23, 47, 53, 71, 73, 127, 173, 233, 251, 269, 281, 347, 353, 359, 431, 487, 491, 509, 541, 563, 569, 593, 613, 677, 743, 773, 827, 857, 863, 883, 929, 953, 977, 1013, 1153, 1187, 1283, 1319, 1361, 1373, 1439, 1481, 1583, 1613, 1619, 1709, 1871, 1997]

cp's OEIS Frontend

A145043 Primes p for which s=2 is the least positive integer such that sp-t(sp) is a triangular number, where t(n) is the maximal triangular number not exceeding n.

Table of values

List of values