Number of permutations avoiding the patterns {1342, 1432, 2341, 2431, 3142, 3241, 3412, 3421, 4132, 4231, 4312, 4321}; number of strong sorting class based on 1342.

A111286

Number of permutations avoiding the patterns {1342, 1432, 2341, 2431, 3142, 3241, 3412, 3421, 4132, 4231, 4312, 4321}; number of strong sorting class based on 1342.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =6a(4) =12a(5) =24a(6) =48a(7) =96a(8) =192a(9) =384a(10) =768a(11) =1536a(12) =3072a(13) =6144a(14) =12288a(15) =24576a(16) =49152a(17) =98304a(18) =196608a(19) =393216a(20) =786432a(21) =1572864a(22) =3145728a(23) =6291456a(24) =12582912a(25) =25165824a(26) =50331648a(27) =100663296a(28) =201326592a(29) =402653184

External references