1,2

Table of n, a(n) for n=1..78.

(PARI) fourkp1(n) = { forstep(x=1, n, 4, for(y=1, floor(sqrt(x)), z=x-y^2; if(issquare(z), print1(floor(sqrt(z))" "); break; ) ) ) }

Sequence in context: A300001 A137218 A306765 * A290820 A278029 A066246

Adjacent sequences: A087816 A087817 A087818 * A087820 A087821 A087822

nonn

Cino Hilliard, Oct 06 2003

approved