Number of nondecreasing arrangements of n numbers in -(n+1)..(n+1) with sum zero.
A188205
Number of nondecreasing arrangements of n numbers in -(n+1)..(n+1) with sum zero.
Terms
- a(0) =1a(1) =4a(2) =13a(3) =55a(4) =252a(5) =1242a(6) =6375a(7) =33885a(8) =184717a(9) =1028172a(10) =5820904a(11) =33427622a(12) =194299052a(13) =1141190188a(14) =6763576681a(15) =40405993509a(16) =243090678343
External references
- oeis: A188205