Number of (w,x,y) with all terms in {0,...,n} and 2*w >= |x+y-z|.

Terms

a(0) =1a(1) =5a(2) =18a(3) =43a(4) =83a(5) =144a(6) =229a(7) =341a(8) =486a(9) =667a(10) =887a(11) =1152a(12) =1465a(13) =1829a(14) =2250a(15) =2731a(16) =3275a(17) =3888a(18) =4573a(19) =5333a(20) =6174a(21) =7099a(22) =8111a(23) =9216a(24) =10417a(25) =11717a(26) =13122a(27) =14635a(28) =16259a(29) =18000