Number of arrays of n integers in -7..7 with sum zero and equal numbers of elements greater than zero and less than zero.
A201810
Number of arrays of n integers in -7..7 with sum zero and equal numbers of elements greater than zero and less than zero.
Terms
- a(0) =1a(1) =15a(2) =43a(3) =1471a(4) =7071a(5) =207621a(6) =1355145a(7) =33222463a(8) =266948431a(9) =5714583505a(10) =53305896645
External references
- oeis: A201810