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Numbers with pandigital biperiod squares.
2

%I #6 Feb 13 2018 11:03:47

%S 428571428571428571429,571428571428571428572,857142857142857142858,

%T 363636363636363636363636363636364,454545454545454545454545454545455,

%U 545454545454545454545454545454546,636363636363636363636363636363637

%N Numbers with pandigital biperiod squares.

%D 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.

%Y Cf. A106497, A181789, A181790.

%K nonn,base

%O 1,1

%A _William Rex Marshall_, Nov 12 2010