Primitive Pythagorean triples (in reverse order) in which two parts are palindromes.
5, 4, 3, 101, 99, 20, 353, 272, 225, 373, 275, 252, 545, 544, 33, 757, 595, 468, 797, 572, 555, 905, 777, 464, 10001, 9880, 1551, 10001, 9999, 200, 10301, 10101, 2020, 12421, 12221, 2220, 14741, 14541, 2420, 39293, 38325, 8668, 48985, 48984, 313
1
This is the union of S000502 and S000504.
T. D. Noe, Plot of 71 triples
T. D. Noe, Table of 71 triples
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
T. D. Noe, Feb 25 2015