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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.

A115544 Numbers k such that k^2 is the concatenation of two numbers m and 6*m.

Table of values

n a(n)
1 4
2 142857142857142857142857142857142858
3 285714285714285714285714285714285716
4 142857142857142857142857142857142857142857142857142857142857142857142857142858

List of values

[4, 142857142857142857142857142857142858, 285714285714285714285714285714285716, 142857142857142857142857142857142857142857142857142857142857142857142857142858]

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

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