OFFSET
1,1
COMMENTS
Sequence A155715 lists the smallest numbers of this kind with x,y > 0, but not necessarily prime. - M. F. Hasler, Jan 27 2009
a(n) > 4*10^9 for n >= 35. - Donovan Johnson, May 29 2012
PROG
(PARI) p=2; for(k=1, 999, forstep( c=k, 1, -1, for( b=1, sqrtint(p\c), issquare(p-c*b^2) & next(2)); p=nextprime(p+1); c=k+1); print1(p", ")) \\ M. F. Hasler, Jan 27 2009
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
a(17)-a(18) corrected and a(26)-a(31) from Donovan Johnson, Sep 29 2009
a(32)-a(34) from Donovan Johnson, May 29 2012
STATUS
approved