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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.

A115531 Numbers k such that the concatenation of k with 3*k gives a square.

Table of values

n a(n)
1 816326530612244897959183673469388
2 1836734693877551020408163265306123
3 3265306122448979591836734693877552
4 3746097814776274713839750260145681581685744016649323621228

List of values

[816326530612244897959183673469388, 1836734693877551020408163265306123, 3265306122448979591836734693877552, 3746097814776274713839750260145681581685744016649323621228]

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

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