Number of set partitions of [n] such that all absolute differences between least elements of consecutive blocks are <= nine.
A287259
Number of set partitions of [n] such that all absolute differences between least elements of consecutive blocks are <= nine.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =52a(6) =203a(7) =877a(8) =4140a(9) =21147a(10) =115975a(11) =678569a(12) =4213081a(13) =27621156a(14) =190402182a(15) =1375129039a(16) =10374133545a(17) =81541494757a(18) =666269176903
External references
- oeis: A287259