Number of ordered set partitions of [n] such that for each block b the smallest integer interval containing b has at most three elements.
A276893
Number of ordered set partitions of [n] such that for each block b the smallest integer interval containing b has at most three elements.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =13a(4) =62a(5) =352a(6) =2348a(7) =17880a(8) =153138a(9) =1458726a(10) =15303672a(11) =175387056a(12) =2180632824a(13) =29240091480a(14) =420683340840
External references
- oeis: A276893