

A097268


Numbers that are both the sum of two nonzero squares and the difference of two nonzero squares.


24



5, 8, 13, 17, 20, 25, 29, 32, 37, 40, 41, 45, 52, 53, 61, 65, 68, 72, 73, 80, 85, 89, 97, 100, 101, 104, 109, 113, 116, 117, 125, 128, 136, 137, 145, 148, 149, 153, 157, 160, 164, 169, 173, 180, 181, 185, 193, 197, 200, 205, 208, 212, 221, 225, 229, 232, 233
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OFFSET

1,1


COMMENTS

Intersection of A000404 (sum of squares) and A024352 (difference of squares).


LINKS



PROG

(PARI) isA097268(n) = forstep( b=2, sqrtint(n1), 2, issquare(nb^2) && return(1)) \\ M. F. Hasler, Jan 24 2009


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



