Number of -n..n arrays x(0..3) of 4 elements with nonzero sum and with zero through 3 differences all nonzero.

A200167

Number of -n..n arrays x(0..3) of 4 elements with nonzero sum and with zero through 3 differences all nonzero.

Terms

    a(0) =0a(1) =76a(2) =576a(3) =2256a(4) =6160a(5) =13888a(6) =27160a(7) =48380a(8) =80096a(9) =125412a(10) =187552a(11) =270688a(12) =378512a(13) =515980a(14) =687836a(15) =899548a(16) =1156496a(17) =1465440a(18) =1832040a(19) =2263800a(20) =2767676a(21) =3351476a(22) =4022752a(23) =4790848a(24) =5663388a(25) =6650440a(26) =7761148a(27) =9005676a(28) =10393744a(29) =11937276

External references