Number of partitions of [n] into m blocks that are ordered with increasing least elements and where block j contains n+1-j (m in {0..ceiling(n/2)}, j in {1..m}).
A363071
Number of partitions of [n] into m blocks that are ordered with increasing least elements and where block j contains n+1-j (m in {0..ceiling(n/2)}, j in {1..m}).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =6a(6) =13a(7) =31a(8) =80a(9) =222a(10) =659a(11) =2082a(12) =6966a(13) =24574a(14) =91067a(15) =353443a(16) =1432909a(17) =6054025a(18) =26599192a(19) =121295345a(20) =573065538a(21) =2800640187a(22) =14137645933a(23) =73619324824a(24) =394979697320
External references
- oeis: A363071