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

Terms

a(0) =0a(1) =4a(2) =15a(3) =43a(4) =88a(5) =164a(6) =267a(7) =415a(8) =600a(9) =844a(10) =1135a(11) =1499a(12) =1920a(13) =2428a(14) =3003a(15) =3679a(16) =4432a(17) =5300a(18) =6255a(19) =7339a(20) =8520a(21) =9844a(22) =11275a(23) =12863a(24) =14568a(25) =16444a(26) =18447a(27) =20635a(28) =22960a(29) =25484