1,1

Patrick De Geest, Palindromic Pseudoprimes (base 2)

Carlos Rivera, Puzzle 170

a(2)= 129921, So the 2nd palindromic pseudoprime(base-2) number is 129921.

Adjacent sequences: A068442 A068443 A068444 this_sequence A068446 A068447 A068448

Sequence in context: A122246 A107274 A107276 this_sequence A115828 A161796 A096929

hard,more,nice,nonn

Shyam Sunder Gupta (guptass(AT)rediffmail.com), Mar 10 2002; extended Oct 20 2002