Number of (w,x,y,z) with all terms in {0,...,n} and max{w,x,y,z}>2*min{w,x,y,z}.

Terms

a(0) =0a(1) =14a(2) =64a(3) =224a(4) =528a(5) =1134a(6) =2064a(7) =3584a(8) =5680a(9) =8750a(10) =12720a(11) =18144a(12) =24864a(13) =33614a(14) =44128a(15) =57344a(16) =72864a(17) =91854a(18) =113760a(19) =140000a(20) =169840a(21) =204974a(22) =244464a(23) =290304a(24) =341328a(25) =399854a(26) =464464a(27) =537824a(28) =618240a(29) =708750