Number of compositions of 2n-1 into exactly 2n-1 nonnegative parts with largest part n.
A318162
Number of compositions of 2n-1 into exactly 2n-1 nonnegative parts with largest part n.
Terms
- a(0) =1a(1) =6a(2) =50a(3) =392a(4) =2970a(5) =22022a(6) =160888a(7) =1162800a(8) =8335338a(9) =59366450a(10) =420630210a(11) =2967563040a(12) =20861295000a(13) =146203657992
External references
- oeis: A318162