Number of ordered triples (w,x,y) with all terms in {-n,...-1,1,...,n} and w+2x+2y>0.

Terms

a(0) =0a(1) =4a(2) =30a(3) =104a(4) =245a(5) =485a(6) =837a(7) =1339a(8) =1998a(9) =2858a(10) =3920a(11) =5234a(12) =6795a(13) =8659a(14) =10815a(15) =13325a(16) =16172a(17) =19424a(18) =23058a(19) =27148a(20) =31665a(21) =36689a(22) =42185a(23) =48239a(24) =54810a(25) =61990a(26) =69732a(27) =78134a(28) =87143a(29) =96863