OFFSET
1,2
LINKS
P. De Geest, Palindromic nonagonals
MATHEMATICA
palQ[n_]:=Module[{idn=IntegerDigits[n]}, idn==Reverse[idn]]; Select[Table[ (n(7n-5))/2, {n, 170000000}], palQ] (* Harvey P. Dale, Nov 15 2011 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Apr 13 2003
STATUS
approved