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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.

A061361 a(1) = 4; a(n) = least number such that the concatenation a(n)a(n-1)...a(2)a(1) is a square.

Table of values

n a(n)
1 4
2 6
3 17
4 604
5 9612
6 85848855
7 109457393440691436
8 16484027824615378535694780556419522
9 2537811713051483817817710620248313487995814710180147690293469081793581

List of values

[4, 6, 17, 604, 9612, 85848855, 109457393440691436, 16484027824615378535694780556419522, 2537811713051483817817710620248313487995814710180147690293469081793581]

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

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