Number of -2..2 arrays x(0..n-1) of n elements with sum zero and with zeroth through n-1st differences all nonzero.

A200032

Number of -2..2 arrays x(0..n-1) of n elements with sum zero and with zeroth through n-1st differences all nonzero.

Terms

    a(0) =0a(1) =4a(2) =2a(3) =28a(4) =26a(5) =168a(6) =214a(7) =1140a(8) =1882a(9) =7930a(10) =15222a(11) =56732a(12) =122760a(13) =416928a(14) =975508a(15) =3116724a(16) =7715598a(17) =23651892a(18) =60875844a(19) =181428684a(20) =479853296a(21) =1403488666a(22) =3783362306a(23) =10927395294

External references