A337156 - cp's OEIS frontend

A337156 Numbers k such that the k-th triangular number has all its prime factors congruent to 1 mod 4.

n	a(n)
1	1
2	25
3	73
4	145
5	169
6	193
7	289
8	313
9	337
10	409
11	457
12	481
13	577
14	625
15	673
16	697
17	745
18	793
19	841
20	865
21	985
22	1009
23	1129
24	1153
25	1201
26	1249
27	1321
28	1345
29	1369
30	1417
31	1465
32	1489
33	1513
34	1537
35	1585
36	1657
37	1681
38	1753
39	1801
40	1873
41	1993
42	2017
43	2041
44	2137
45	2257
46	2305
47	2329
48	2377
49	2425
50	2473

[1, 25, 73, 145, 169, 193, 289, 313, 337, 409, 457, 481, 577, 625, 673, 697, 745, 793, 841, 865, 985, 1009, 1129, 1153, 1201, 1249, 1321, 1345, 1369, 1417, 1465, 1489, 1513, 1537, 1585, 1657, 1681, 1753, 1801, 1873, 1993, 2017, 2041, 2137, 2257, 2305, 2329, 2377, 2425, 2473]

cp's OEIS Frontend

A337156 Numbers k such that the k-th triangular number has all its prime factors congruent to 1 mod 4.

Table of values

List of values