Number of permutations of length n avoiding 12345 and 12354.
A224295
Number of permutations of length n avoiding 12345 and 12354.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =118a(6) =672a(7) =4256a(8) =29176a(9) =212586a(10) =1625704a(11) =12930160a(12) =106242392a(13) =897210996a(14) =7756325952a(15) =68422701792a(16) =614341492144
External references
- oeis: A224295