Number of arrays of 2n nondecreasing integers in -6..6 with sum zero and equal numbers greater than zero and less than zero.

A203289

Number of arrays of 2n nondecreasing integers in -6..6 with sum zero and equal numbers greater than zero and less than zero.

Terms

    a(0) =7a(1) =54a(2) =310a(3) =1380a(4) =5036a(5) =15798a(6) =43958a(7) =111053a(8) =259023a(9) =565010a(10) =1164062a(11) =2283094a(12) =4289830a(13) =7762060a(14) =13582916a(15) =23070101a(16) =38147395a(17) =61569710a(18) =97213302a(19) =150446614a(20) =228597390a(21) =341536652a(22) =502400112a(23) =728473703a(24) =1042269641a(25) =1472826974

External references