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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.

A239203 Numbers k such that k+x+y is a square and k+u+v is a triangular number, where x and y are the two squares nearest to k, while u and v are the two triangular numbers nearest to k.

Table of values

n a(n)
1 0
2 11
3 218987
4 55844736
5 8299697699240
6 2585386023324464

List of values

[0, 11, 218987, 55844736, 8299697699240, 2585386023324464]

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

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