Number of arrays of 12 nondecreasing integers in -n..n with sum zero and equal numbers greater than zero and less than zero.

A203296

Number of arrays of 12 nondecreasing integers in -n..n with sum zero and equal numbers greater than zero and less than zero.

Terms

    a(0) =7a(1) =28a(2) =176a(3) =944a(4) =4206a(5) =15798a(6) =51768a(7) =151393a(8) =403131a(9) =991692a(10) =2280620a(11) =4948566a(12) =10208256a(13) =20143302a(14) =38215998a(15) =70007951a(16) =124283183a(17) =214475760a(18) =360744276a(19) =592751998a(20) =953388836a(21) =1503671490a(22) =2329136950a(23) =3548069499a(24) =5322005825

External references