A077674 -id:A077674 - cp's OEIS frontend

A077676 Squares using only squarefree digits (2, 3, 5, 6, 7).

25, 36, 225, 256, 576, 625, 676, 5625, 5776, 7225, 27225, 27556, 37636, 55225, 65536, 75625, 225625, 226576, 235225, 265225, 266256, 275625, 276676, 367236, 525625, 553536, 732736, 765625, 767376, 2322576, 2325625, 2356225, 2637376, 2673225

Offset: 1

Amarnath Murthy, Nov 16 2002

a(n) is == 5 or 6 (mod 10).

Harvey P. Dale, Table of n, a(n) for n = 1..600

Cf. A077674, A077675, A006716. Different from A077437.

sfdsQ[n_]:=Module[{idn=DigitCount[n]},idn[[1]]==idn[[4]]==idn[[8]] == idn[[9]]==idn[[10]]==0]; Select[Range[2000]^2,sfdsQ] (* Harvey P. Dale, Oct 09 2011 *)
Table[Select[FromDigits/@Tuples[{2,3,5,6,7},n],IntegerQ[Sqrt[#]]&],{n,2,7}]//Flatten (* Harvey P. Dale, Feb 04 2015 *)

Corrected and extended by Sascha Kurz, Jan 28 2003

A077675 Squarefree numbers with square nonzero square digits.

Original entry on oeis.org

11, 14, 19, 41, 89, 91, 94, 111, 114, 118, 119, 141, 149, 181, 191, 194, 199, 411, 418, 419, 449, 481, 489, 491, 494, 498, 499, 811, 814, 818, 849, 881, 889, 894, 898, 899, 911, 914, 919, 941, 949, 989, 991, 994, 998, 1111, 1114, 1118, 1119, 1141, 1149

Offset: 1

Amarnath Murthy, Nov 16 2002

Cf. A077674.

Select[Flatten[Table[FromDigits/@Tuples[{1,4,8,9},n],{n,2,4}]],SquareFreeQ] (* Harvey P. Dale, Oct 10 2013 *)

Corrected and extended by David Garber, Nov 19 2002

cp's OEIS Frontend

A077676 Squares using only squarefree digits (2, 3, 5, 6, 7).

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