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

1,3

Links

Table of n, a(n) for n=1..44.

Example

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

Prog

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

Crossrefs

Cf. A217761.

Sequence in context: A330580 A254959 A028869 * A073172 A168139 A258660

Adjacent sequences: A179932 A179933 A179934 * A179936 A179937 A179938

Keyword

nonn,base,less

Author

Dominick Cancilla, Aug 02 2010

Status

approved