A181791 Numbers with pandigital biperiod squares.

428571428571428571429, 571428571428571428572, 857142857142857142858, 363636363636363636363636363636364, 454545454545454545454545454545455, 545454545454545454545454545454546, 636363636363636363636363636363637

Offset

1,1

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.

Links

Table of n, a(n) for n=1..7.

Crossrefs

Cf. A106497, A181789, A181790.

Sequence in context: A338983 A338967 A239924 * A217431 A173471 A291215

Adjacent sequences: A181788 A181789 A181790 * A181792 A181793 A181794

Keyword

nonn,base

Author

William Rex Marshall, Nov 12 2010

Status

approved