Number of (w,x,y,z) with all terms in {1,...,n} and 2*w*x>3*y*z.

Terms

a(0) =0a(1) =0a(2) =5a(3) =23a(4) =80a(5) =218a(6) =456a(7) =865a(8) =1505a(9) =2428a(10) =3732a(11) =5522a(12) =7841a(13) =10877a(14) =14710a(15) =19424a(16) =25221a(17) =32282a(18) =40624a(19) =50551a(20) =62171a(21) =75686a(22) =91309a(23) =109293a(24) =129662a(25) =152868a(26) =179061a(27) =208361a(28) =241167a(29) =277832