Number of set partitions of [n] such that all absolute differences between least elements of consecutive blocks and between consecutive elements within the blocks are not larger than six.
A287585
Number of set partitions of [n] such that all absolute differences between least elements of consecutive blocks and between consecutive elements within the blocks are not larger than six.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =52a(6) =203a(7) =877a(8) =3936a(9) =18095a(10) =84280a(11) =394852a(12) =1852811a(13) =8691683a(14) =40761476a(15) =190968022a(16) =893534860a(17) =4175717815a(18) =19494813589a(19) =90945241124a(20) =424026717957
External references
- oeis: A287585