Number of set partitions of [n] such that all absolute differences between least elements of consecutive blocks are <= five.
A287255
Number of set partitions of [n] such that all absolute differences between least elements of consecutive blocks are <= five.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =52a(6) =203a(7) =876a(8) =4104a(9) =20666a(10) =111075a(11) =633704a(12) =3819875a(13) =24230302a(14) =161175189a(15) =1120918549a(16) =8129696204a(17) =61351621492a(18) =480802257296
External references
- oeis: A287255