The number of partitions of the set [n] where each element can be colored 1 or 2 avoiding the patterns 1^11^2 in the equality sense.
A209801
The number of partitions of the set [n] where each element can be colored 1 or 2 avoiding the patterns 1^11^2 in the equality sense.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =30a(4) =152a(5) =878a(6) =5653a(7) =39952a(8) =306419a(9) =2527984a(10) =22277080a(11) =208483014a(12) =2062199125a(13) =21472152822a(14) =234526948183
External references
- oeis: A209801