Number of permutations of order n avoiding the consecutive pattern 12'1'2.
A177473
Number of permutations of order n avoiding the consecutive pattern 12'1'2.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =18a(5) =61a(6) =272a(7) =1410a(8) =8048a(9) =51550a(10) =372995a(11) =2976679a(12) =25686748a(13) =239687103a(14) =2419267562a(15) =26194183096a(16) =301838412516
External references
- oeis: A177473