A008509 - cp's OEIS frontend

A008509 Positive integers k such that k-th triangular number is palindromic.

n	a(n)
1	1
2	2
3	3
4	10
5	11
6	18
7	34
8	36
9	77
10	109
11	132
12	173
13	363
14	1111
15	1287
16	1593
17	1833
18	2662
19	3185
20	3369
21	3548
22	8382
23	11088
24	18906
25	50281
26	57166
27	102849
28	111111
29	167053
30	179158
31	246642
32	337650
33	342270
34	365436
35	417972
36	1620621
37	3240425
38	3457634
39	3707883

[1, 2, 3, 10, 11, 18, 34, 36, 77, 109, 132, 173, 363, 1111, 1287, 1593, 1833, 2662, 3185, 3369, 3548, 8382, 11088, 18906, 50281, 57166, 102849, 111111, 167053, 179158, 246642, 337650, 342270, 365436, 417972, 1620621, 3240425, 3457634, 3707883]

cp's OEIS Frontend

A008509 Positive integers k such that k-th triangular number is palindromic.

Table of values

List of values