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

Terms

a(0) =0a(1) =4a(2) =16a(3) =45a(4) =94a(5) =172a(6) =281a(7) =433a(8) =626a(9) =875a(10) =1177a(11) =1547a(12) =1981a(13) =2497a(14) =3087a(15) =3772a(16) =4543a(17) =5421a(18) =6396a(19) =7492a(20) =8695a(21) =10032a(22) =11488a(23) =13090a(24) =14822a(25) =16714a(26) =18746a(27) =20951a(28) =23308a(29) =25850