Number of ordered set partitions of [n] such that for each block b the smallest integer interval containing b has at most four elements.
A276894
Number of ordered set partitions of [n] such that for each block b the smallest integer interval containing b has at most four elements.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =13a(4) =75a(5) =466a(6) =3272a(7) =26032a(8) =232820a(9) =2304600a(10) =25003176a(11) =295139034a(12) =3767545662a(13) =51729553992a(14) =760326663792
External references
- oeis: A276894