Number of ordered triples (w,x,y) with all terms in {1,...,n} and w^2<=x^2+y^2.

Terms

a(0) =0a(1) =1a(2) =7a(3) =22a(4) =51a(5) =99a(6) =168a(7) =265a(8) =393a(9) =556a(10) =760a(11) =1008a(12) =1307a(13) =1659a(14) =2067a(15) =2538a(16) =3076a(17) =3687a(18) =4372a(19) =5136a(20) =5985a(21) =6924a(22) =7954a(23) =9083a(24) =10316a(25) =11656a(26) =13105a(27) =14667a(28) =16351a(29) =18162