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A360280
Squares that are the hypotenuse of a primitive Pythagorean triangle.
0
25, 169, 289, 625, 841, 1369, 1681, 2809, 3721, 4225, 5329, 7225, 7921, 9409, 10201, 11881, 12769, 15625, 18769, 21025, 22201, 24649, 28561, 29929, 32761, 34225, 37249, 38809, 42025, 48841, 52441, 54289, 58081, 66049, 70225, 72361, 76729, 78961, 83521, 85849, 93025, 97969
OFFSET
1,1
COMMENTS
All terms are congruent to 1 (mod 8).
FORMULA
a(n) = A008846(n)^2.
EXAMPLE
169 is a term because 169 = 13^2 and (119,120,169) is a primitive Pythagorean triangle.
CROSSREFS
KEYWORD
nonn
AUTHOR
Alexandru Petrescu, Feb 01 2023
STATUS
approved