Number of strictly increasing arrangements of n nonzero numbers in -(n+6)..(n+6) with sum zero.

A188121

Number of strictly increasing arrangements of n nonzero numbers in -(n+6)..(n+6) with sum zero.

Terms

    a(0) =0a(1) =8a(2) =32a(3) =167a(4) =740a(5) =3278a(6) =13994a(7) =58595a(8) =241250a(9) =982016a(10) =3959736a(11) =15848648a(12) =63063260a(13) =249773862a(14) =985585668a(15) =3877333900a(16) =15216566840a(17) =59600223620a(18) =233072224782a(19) =910286934007

External references