The hypotenuse of a primitive Pythagorean triangle in which the two legs are palindromes.
5, 905, 48985, 55145, 61373, 96433, 2228137, 5579333, 6377873, 24382493, 504110405, 538710545, 541524145, 545736545
1
The hypotenuse of the triples in S000501
T. D. Noe, Plot of 14 terms
John Rafael M. Antalan and Richard P. Tagle, Numeric palindromes in primitive and non-primitive Pythagorean triples, arxiv.org 1502.06760 (Feb 24 2015)
Eric W. Weisstein, MathWorld: Pythagorean Triple
Cf. S000501-S000509, S000579, S000580.
nonn,base,hard,more
T. D. Noe, Feb 25 2015