cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A028386 Numbers k such that k*(3k-1)/2 is a pentagonal palindrome.

Table of values

n a(n)
1 1
2 2
3 4
4 26
5 44
6 101
7 693
8 2173
9 2229
10 4228
11 6010
12 26466
13 26906
14 31926
15 44059
16 1258723
17 1965117
18 1979130
19 2684561
20 13280839
21 59401650
22 84885761
23 100058581
24 225563533
25 316882086
26 700457153
27 818049201
28 851649306
29 1345679688
30 2049123156
31 6693818696
32 18306458265
33 18517422797

List of values

[1, 2, 4, 26, 44, 101, 693, 2173, 2229, 4228, 6010, 26466, 26906, 31926, 44059, 1258723, 1965117, 1979130, 2684561, 13280839, 59401650, 84885761, 100058581, 225563533, 316882086, 700457153, 818049201, 851649306, 1345679688, 2049123156, 6693818696, 18306458265, 18517422797]