OFFSET
1,1
COMMENTS
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
Eric Weisstein's World of Mathematics, Sum of Squares Function.
PROG
(PARI) isA097268(n) = forstep( b=2, sqrtint(n-1), 2, issquare(n-b^2) && return(1)) \\ M. F. Hasler, Jan 24 2009
CROSSREFS
KEYWORD
nonn
AUTHOR
Ray Chandler, Aug 19 2004
STATUS
approved