Number of ordered triples (w,x,y) with all terms in {-n,...-1,1,...,n} and w+2x+3y>0.

Terms

a(0) =0a(1) =3a(2) =29a(3) =103a(4) =247a(5) =484a(6) =843a(7) =1342a(8) =2008a(9) =2866a(10) =3938a(11) =5247a(12) =6822a(13) =8681a(14) =10851a(15) =13357a(16) =16221a(17) =19466a(18) =23121a(19) =27204a(20) =31742a(21) =36760a(22) =42280a(23) =48325a(24) =54924a(25) =62095a(26) =69865a(27) =78259a(28) =87299a(29) =97008