1,1
C. Rivera, Source 3
Eric Weisstein's World of Mathematics, Palindromic Prime
P. De Geest, Palindromic Sums of Squares of Consecutive Integers
Cf. A050236.
Sequence in context: A162136 A053363 A027572 * A094081 A189645 A096543
Adjacent sequences: A050236 A050237 A050238 * A050240 A050241 A050242
nonn,nice,hard,base
Eric Weisstein (eric(AT)weisstein.com)
No others < 10^20 - Patrick De Geest (pdg(AT)worldofnumbers.com), 8/99.