Number of (w,x,y,z) with all terms in {1,...,n} and w^3<x^3+y^3+z^3.

Terms

a(0) =0a(1) =1a(2) =15a(3) =72a(4) =221a(5) =536a(6) =1098a(7) =2028a(8) =3445a(9) =5502a(10) =8368a(11) =12234a(12) =17304a(13) =23794a(14) =31963a(15) =42089a(16) =54439a(17) =69332a(18) =87070a(19) =108013a(20) =132549a(21) =161043a(22) =193924a(23) =231550a(24) =274463a(25) =323023a(26) =377776a(27) =439254a(28) =507882a(29) =584329