Number of nondecreasing arrangements of n numbers in -(n+2)..(n+2) with sum zero.
A188206
Number of nondecreasing arrangements of n numbers in -(n+2)..(n+2) with sum zero.
Terms
- a(0) =1a(1) =5a(2) =18a(3) =86a(4) =414a(5) =2137a(6) =11322a(7) =61731a(8) =343363a(9) =1943488a(10) =11157558a(11) =64841876a(12) =380777798a(13) =2256500525a(14) =13479035412a(15) =81085573679a(16) =490856939495
External references
- oeis: A188206