Number of (w,x,y) with all terms in {0,...,n} and the numbers w,x,y,|w-x|,|x-y| not distinct.

Terms

a(0) =1a(1) =8a(2) =27a(3) =64a(4) =125a(5) =204a(6) =305a(7) =420a(8) =569a(9) =714a(10) =909a(11) =1096a(12) =1327a(13) =1550a(14) =1833a(15) =2086a(16) =2411a(17) =2706a(18) =3071a(19) =3402a(20) =3815a(21) =4176a(22) =4635a(23) =5038a(24) =5533a(25) =5972a(26) =6519a(27) =6988a(28) =7577a(29) =8088