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.

A305292 Numbers k such that k-1 is a square and k+1 is a triangular number.

Table of values

n a(n)
1 2
2 5
3 65
4 170
5 2210
6 5777
7 75077
8 196250
9 2550410
10 6666725
11 86638865
12 226472402
13 2943171002
14 7693394945
15 99981175205
16 261348955730
17 3396416785970
18 8878171099877
19 115378189547777
20 301596468440090
21 3919462027838450
22 10245401755863185
23 133146330756959525

List of values

[2, 5, 65, 170, 2210, 5777, 75077, 196250, 2550410, 6666725, 86638865, 226472402, 2943171002, 7693394945, 99981175205, 261348955730, 3396416785970, 8878171099877, 115378189547777, 301596468440090, 3919462027838450, 10245401755863185, 133146330756959525]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.