Number of set partitions of [n] such that all absolute differences between least elements of consecutive blocks are <= seven.

A287257

Number of set partitions of [n] such that all absolute differences between least elements of consecutive blocks are <= seven.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =52a(6) =203a(7) =877a(8) =4140a(9) =21146a(10) =115843a(11) =675473a(12) =4168497a(13) =27104931a(14) =185021744a(15) =1321754226a(16) =9855001715a(17) =76507188271a(18) =617104691644

External references