A179935 Squares where the number of decimal digits is also a square.

0, 1, 4, 9, 1024, 1089, 1156, 1225, 1296, 1369, 1444, 1521, 1600, 1681, 1764, 1849, 1936, 2025, 2116, 2209, 2304, 2401, 2500, 2601, 2704, 2809, 2916, 3025, 3136, 3249, 3364, 3481, 3600, 3721, 3844, 3969, 4096, 4225, 4356, 4489, 4624, 4761, 4900, 5041

Offset: 1

Author

Dominick Cancilla, Aug 02 2010

Keywords

• nonn
• base
• less

Examples

			100180081 is a square (10009^2). The number of digits in 100180081 is 9, also a square (3^2).
		

Crossrefs

Cf. A217761.

Programs

PARI

isok(n) = issquare(n) && issquare(length(Str(n))); \\ Michel Marcus, Aug 28 2013