1,3

The sequence is inverse to A102859.

Table of n, a(n) for n=1..61.

Index entry for sequences related to reversing digits of squares

r[n_] := FromDigits@ Reverse@ IntegerDigits@ n; Sqrt@ r[#^2] & /@ Select[Range[0, 1101], IntegerQ@ Sqrt@ r[#^2] &] (* Michael De Vlieger, Sep 21 2015 *)

Cf. A102859.

Sequence in context: A174017 A178081 A129969 * A142714 A276012 A176701

Adjacent sequences: A104376 A104377 A104378 * A104380 A104381 A104382

nonn,base

Zak Seidov, Mar 03 2005

0 inserted, and name replaced with formula, by Jon E. Schoenfield, Sep 20 2015

approved