Number of multisets of size n that have an alternating permutation and cover an initial interval of positive integers.
A349055
Number of multisets of size n that have an alternating permutation and cover an initial interval of positive integers.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =5a(5) =12a(6) =24a(7) =52a(8) =108a(9) =224a(10) =464a(11) =944a(12) =1936a(13) =3904a(14) =7936a(15) =15936a(16) =32192a(17) =64512a(18) =129792a(19) =259840a(20) =521472a(21) =1043456a(22) =2091008a(23) =4183040a(24) =8375296a(25) =16752640a(26) =33525760a(27) =67055616a(28) =134156288a(29) =268320768
External references
- oeis: A349055