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 five.
A287584
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 five.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =52a(6) =203a(7) =824a(8) =3407a(9) =14176a(10) =58954a(11) =244412a(12) =1010802a(13) =4167621a(14) =17133558a(15) =70278017a(16) =287797888a(17) =1177218237a(18) =4811244031a(19) =19651589669a(20) =80234989720a(21) =327503437323
External references
- oeis: A287584