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

Terms

a(0) =0a(1) =3a(2) =12a(3) =27a(4) =48a(5) =78a(6) =120a(7) =174a(8) =240a(9) =321a(10) =420a(11) =537a(12) =672a(13) =828a(14) =1008a(15) =1212a(16) =1440a(17) =1695a(18) =1980a(19) =2295a(20) =2640a(21) =3018a(22) =3432a(23) =3882a(24) =4368a(25) =4893a(26) =5460a(27) =6069a(28) =6720a(29) =7416