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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.

A181791 Numbers with pandigital biperiod squares.

Original entry on oeis.org

428571428571428571429, 571428571428571428572, 857142857142857142858, 363636363636363636363636363636364, 454545454545454545454545454545455, 545454545454545454545454545454546, 636363636363636363636363636363637
Offset: 1

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Author

William Rex Marshall, Nov 12 2010

Keywords

References

  • R. Ondrejka, Problem 1130: Biperiod Squares, Journal of Recreational Mathematics, Vol. 14:4 (1981-82), 299. Solution by F. H. Kierstead, Jr., JRM, Vol. 15:4 (1982-83), 311-312.

Crossrefs

Cf. A106497, A181789, A181790.

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