OFFSET
1,2
COMMENTS
a(22) > 5*10^11. - Giovanni Resta, Apr 16 2017
EXAMPLE
reverse(1) + reverse(2) + ... + reverse(25) + reverse(26) = 1 + 2 + ...+ 52 + 62 = 729 = 27^2, so 26 is a term of the sequence.
MATHEMATICA
s = 0; r = {}; For[i = 1, i <= 10^5, i++, s = s + FromDigits[Reverse[IntegerDigits[i]]]; If[IntegerQ[s^(1/2)], r = Append[r, i]]]; r
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Joseph L. Pe, Sep 19 2002
EXTENSIONS
a(11)-a(21) from Giovanni Resta, Apr 16 2017
STATUS
approved