Number of set partitions of [n] such that for each block b the smallest integer interval containing b has at most five elements.
A276721
Number of set partitions of [n] such that for each block b the smallest integer interval containing b has at most five elements.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =52a(6) =151a(7) =409a(8) =1100a(9) =3012a(10) =8487a(11) =23949a(12) =67179a(13) =187431a(14) =521889a(15) =1455667a(16) =4066220a(17) =11363476a(18) =31747666a(19) =88659265a(20) =247559056a(21) =691294366a(22) =1930595096a(23) =5391864630a(24) =15058449487a(25) =42054270461a(26) =117445036871a(27) =327989716409a(28) =915985822220
External references
- oeis: A276721