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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.

A251730 Numbers n such that the sum of the triangular numbers T(n) and T(n+1) is equal to the sum of two pentagonal numbers P(m) and P(m+1) for some m.

Table of values

n a(n)
1 10
2 152
3 2130
4 29680
5 413402
6 5757960
7 80198050
8 1117014752
9 15558008490
10 216695104120
11 3018173449202
12 42037733184720
13 585510091136890
14 8155103542731752
15 113585939507107650
16 1582048049556775360
17 22035086754287747402
18 306909166510471688280

List of values

[10, 152, 2130, 29680, 413402, 5757960, 80198050, 1117014752, 15558008490, 216695104120, 3018173449202, 42037733184720, 585510091136890, 8155103542731752, 113585939507107650, 1582048049556775360, 22035086754287747402, 306909166510471688280]

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

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