The hypotenuse of primitive Pythagorean triples in which two parts are palindromes.
5, 101, 353, 373, 545, 757, 797, 905, 10001, 10301, 12421, 14741, 39293, 48985, 52025, 52225, 55145, 58885, 61373, 79897, 94349, 96433, 1000001, 1044401, 1220221, 1242421, 2228137, 3155513, 3157513, 3559553, 3575753, 3755573, 3779773, 5200025, 5579333
1
The hypotenuse of the triples in S000505. Note that we show each hypotenuse only once, even though it may occur more than once.
T. D. Noe, Plot of 69 terms
T. D. Noe, Table of 69 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-S000508, S000579, S000580.
nonn,base,hard
T. D. Noe, Feb 25 2015