Number of arrays of 2n nondecreasing integers in -7..7 with sum zero and equal numbers greater than zero and less than zero.

A203290

Number of arrays of 2n nondecreasing integers in -7..7 with sum zero and equal numbers greater than zero and less than zero.

Terms

    a(0) =8a(1) =80a(2) =580a(3) =3172a(4) =13934a(5) =51768a(6) =168314a(7) =491187a(8) =1310474a(9) =3241912a(10) =7518232a(11) =16487840a(12) =34435060a(13) =68887342a(14) =132636714a(15) =246789735a(16) =445262312a(17) =781274626a(18) =1336560456a(19) =2234216814a(20) =3656356722a(21) =5868037410a(22) =9249277184a(23) =14337411833

External references