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

Terms

a(0) =0a(1) =4a(2) =17a(3) =47a(4) =96a(5) =176a(6) =286a(7) =439a(8) =634a(9) =885a(10) =1188a(11) =1561a(12) =1997a(13) =2515a(14) =3108a(15) =3796a(16) =4569a(17) =5451a(18) =6429a(19) =7528a(20) =8735a(21) =10076a(22) =11535a(23) =13142a(24) =14878a(25) =16774a(26) =18811a(27) =21021a(28) =23382a(29) =25930