Number of nondecreasing arrangements of n numbers in -(n+6)..(n+6) with sum zero and not more than two numbers equal.
A188235
Number of nondecreasing arrangements of n numbers in -(n+6)..(n+6) with sum zero and not more than two numbers equal.
Terms
- a(0) =1a(1) =9a(2) =49a(3) =311a(4) =1852a(5) =10994a(6) =64370a(7) =374820a(8) =2171675a(9) =12546170a(10) =72337436a(11) =416605786a(12) =2397909069a(13) =13799639040a(14) =79425097850a(15) =457295766838
External references
- oeis: A188235