Number of strictly increasing arrangements of n numbers in -(n+4)..(n+4) with sum zero.

A188178

Number of strictly increasing arrangements of n numbers in -(n+4)..(n+4) with sum zero.

Terms

    a(0) =1a(1) =6a(2) =25a(3) =104a(4) =414a(5) =1636a(6) =6375a(7) =24591a(8) =94257a(9) =360002a(10) =1371535a(11) =5216252a(12) =19819846a(13) =75277670a(14) =285893124a(15) =1085984406a(16) =4126777398a(17) =15690144942a(18) =59691687518a(19) =227248928264a(20) =865788366806

External references