Number of set partitions of [n] such that for each block b the smallest integer interval containing b has at most six elements and for at least one block c the smallest integer interval containing c has exactly six elements.

A320556

Number of set partitions of [n] such that for each block b the smallest integer interval containing b has at most six elements and for at least one block c the smallest integer interval containing c has exactly six elements.

Terms

    a(0) =52a(1) =265a(2) =966a(3) =3172a(4) =10100a(5) =32918a(6) =111138a(7) =373888a(8) =1238236a(9) =4034221a(10) =12991481a(11) =41567855a(12) =132719006a(13) =423099220a(14) =1346053178a(15) =4271656023a(16) =13520858094a(17) =42696919677a(18) =134582517515a(19) =423599583268

External references