Number of compositions of 2n into exactly 2n nonnegative parts with largest part n.
A318161
Number of compositions of 2n into exactly 2n nonnegative parts with largest part n.
Terms
- a(0) =1a(1) =1a(2) =18a(3) =195a(4) =1652a(5) =12825a(6) =96030a(7) =705341a(8) =5116200a(9) =36773397a(10) =262462010a(11) =1862790699a(12) =13160496684a(13) =92624149475a(14) =649794035142
External references
- oeis: A318161