OFFSET
1,1
COMMENTS
Palindromes h such that 4*h - 31 is a square. - Bruno Berselli, Aug 29 2018
LINKS
MATHEMATICA
palQ[n_] := Block[{d = IntegerDigits[n]}, d == Reverse[d]]; f[n_] := n^2 + n + 8; Select[f@ Range[0, 3*10^5], palQ] (* Giovanni Resta, Aug 29 2018 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
EXTENSIONS
a(14)-a(19) from Giovanni Resta, Aug 29 2018
STATUS
approved