Number of nondecreasing arrangements of n numbers in -(n+4)..(n+4) with sum zero and not more than two numbers equal.
A188233
Number of nondecreasing arrangements of n numbers in -(n+4)..(n+4) with sum zero and not more than two numbers equal.
Terms
- a(0) =1a(1) =7a(2) =31a(3) =172a(4) =903a(5) =4859a(6) =26123a(7) =141519a(8) =769915a(9) =4209720a(10) =23118268a(11) =127495912a(12) =705885128a(13) =3922515554a(14) =21871461990a(15) =122341995397a(16) =686381562245
External references
- oeis: A188233