Number of (w,x,y,z) with all terms in {0,...,n} and at least one of these conditions holds: w<R, x<R, y>R, z>R, where R = max{w,x,y,z} - min{w,x,y,z}.

A212753

Number of (w,x,y,z) with all terms in {0,...,n} and at least one of these conditions holds: w<R, x<R, y>R, z>R, where R = max{w,x,y,z} - min{w,x,y,z}.

Terms

    a(0) =0a(1) =12a(2) =69a(3) =228a(4) =568a(5) =1192a(6) =2225a(7) =3816a(8) =6136a(9) =9380a(10) =13765a(11) =19532a(12) =26944a(13) =36288a(14) =47873a(15) =62032a(16) =79120a(17) =99516a(18) =123621a(19) =151860a(20) =184680a(21) =222552a(22) =265969a(23) =315448a(24) =371528a(25) =434772a(26) =505765a(27) =585116a(28) =673456a(29) =771440

External references