A320617 - OEIS

A320617

Number of ordered set partitions of [n] where k = four is minimal such that for each block b the smallest integer interval containing b has at most k elements.

%I #4 Oct 17 2018 16:51:43

%S 13,114,924,8152,79682,845874,9699504,119751978,1586912838,

%T 22489462512,339643322952,5448229269576,92547041455104,

%U 1660105401121800,31366215961317480,622755664408102200,12964583019385962840,282431877654287832480,6426548730391132252800

%N Number of ordered set partitions of [n] where k = four is minimal such that for each block b the smallest integer interval containing b has at most k elements.

%H Alois P. Heinz, <a href="/A320617/b320617.txt">Table of n, a(n) for n = 4..450</a>

%Y Column k=4 of A276891.

%Y Cf. A320554.

%K nonn

%O 4,1

%A _Alois P. Heinz_, Oct 17 2018