Number of partitions of [n] such that in each block the smallest element and the largest element have opposite parities.
A361084
Number of partitions of [n] such that in each block the smallest element and the largest element have opposite parities.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =0a(4) =3a(5) =2a(6) =17a(7) =28a(8) =171a(9) =430a(10) =2617a(11) =8496a(12) =54739a(13) =214714a(14) =1477153a(15) =6743204a(16) =49550011a(17) =256645926a(18) =2010328585a(19) =11602635128a(20) =96590823907a(21) =612918061426
External references
- oeis: A361084