Number of ordered triples (w,x,y) with all terms in {-n,...,-1,1,...,n} and w+3x+3y>0.

Terms

a(0) =0a(1) =4a(2) =32a(3) =104a(4) =250a(5) =492a(6) =845a(7) =1349a(8) =2021a(9) =2871a(10) =3949a(11) =5267a(12) =6830a(13) =8698a(14) =10878a(15) =13370a(16) =16244a(17) =19502a(18) =23139a(19) =27235a(20) =31787a(21) =36785a(22) =42319a(23) =48381a(24) =54956a(25) =62144a(26) =69932a(27) =78300a(28) =87358a(29) =97088