Number of permutations of {1..n} with fewer than 2 interior elements having values lying between the values of their neighbors.
A226435
Number of permutations of {1..n} with fewer than 2 interior elements having values lying between the values of their neighbors.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =22a(5) =90a(6) =422a(7) =2226a(8) =13102a(9) =85170a(10) =606542a(11) =4697946a(12) =39330982a(13) =353985450a(14) =3408792662a(15) =34975509666a(16) =380947661662
External references
- oeis: A226435