Number of permutations of length n containing 2 occurrences of 132.
A082970
Number of permutations of length n containing 2 occurrences of 132.
Terms
- a(0) =4a(1) =23a(2) =107a(3) =464a(4) =1950a(5) =8063a(6) =33033a(7) =134576a(8) =546312a(9) =2212550a(10) =8946454a(11) =36134656a(12) =145831270a(13) =588199815a(14) =2371435125a(15) =9557736480a(16) =38511326040a(17) =155143873170a(18) =624899673690
External references
- oeis: A082970