Number of compositions of n into exactly 2n nonnegative parts such that each positive i-th part is odd if i is odd.
A348474
Number of compositions of n into exactly 2n nonnegative parts such that each positive i-th part is odd if i is odd.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =41a(4) =220a(5) =1212a(6) =6803a(7) =38691a(8) =222196a(9) =1285610a(10) =7482718a(11) =43762754a(12) =256972507a(13) =1514020484a(14) =8945944435a(15) =52990732161a(16) =314568593860
External references
- oeis: A348474