login
A054969
Palindromic hexagonal numbers.
5
0, 1, 6, 66, 3003, 5995, 15051, 66066, 617716, 828828, 1269621, 1680861, 5073705, 5676765, 1264114621, 5289009825, 6172882716, 13953435931, 1313207023131, 5250178710525, 6874200024786, 61728399382716, 602224464422206, 636188414881636, 1250444114440521
OFFSET
1,3
LINKS
MATHEMATICA
Select[PolygonalNumber[6, Range[0, 10^6]], PalindromeQ] (* Robert Price, Apr 27 2019 *)
CROSSREFS
Intersection of A000384 and A002113.
Sequence in context: A259123 A292026 A126459 * A068966 A063039 A082781
KEYWORD
nonn,base
AUTHOR
Jeff Heleen, May 26 2000
EXTENSIONS
Added a(1)=0 by Robert Price, Apr 27 2019
STATUS
approved