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

Terms

a(0) =0a(1) =3a(2) =14a(3) =41a(4) =87a(5) =161a(6) =265a(7) =409a(8) =594a(9) =831a(10) =1120a(11) =1473a(12) =1889a(13) =2381a(14) =2947a(15) =3601a(16) =4340a(17) =5179a(18) =6114a(19) =7161a(20) =8315a(21) =9593a(22) =10989a(23) =12521a(24) =14182a(25) =15991a(26) =17940a(27) =20049a(28) =22309a(29) =24741