A077437 Squares whose decimal digits are nonsquares (2, 3, 5, 6, 7, 8).

25, 36, 225, 256, 576, 625, 676, 5625, 5776, 7225, 8836, 27225, 27556, 33856, 37636, 55225, 65536, 75625, 225625, 226576, 235225, 265225, 266256, 275625, 276676, 286225, 352836, 367236, 378225, 525625, 538756, 553536, 585225, 586756, 665856

Offset: 1

Author

Reinhard Zumkeller, Nov 06 2002

Keywords

• nonn
• base

Links

• Harvey P. Dale and Charles R Greathouse IV, Table of n, a(n) for n = 1..10000 (first 294 terms from Dale)

Crossrefs

Cf. A019544, A000290. Different from A077676.

Programs

Mathematica

Flatten[Table[Select[FromDigits/@Tuples[{2,3,5,6,7,8},n],IntegerQ[ Sqrt[ #]]&],{n,2,6}]] (* Harvey P. Dale, Feb 05 2014 *)

PARI

is(n)=issquare(n) && #setintersect(Set(digits(n)),[0,1,4,9])==0 \\ Charles R Greathouse IV, Aug 28 2016

Extensions

Replaced 9 by 8 in the definition. - Tanya Khovanova, Dec 09 2008