Number of permutations p() of 1..n+6 with centered difference p(i+1)-p(i-1) < 0 exactly 5 times.
A180883
Number of permutations p() of 1..n+6 with centered difference p(i+1)-p(i-1) < 0 exactly 5 times.
Terms
- a(0) =35a(1) =1540a(2) =45738a(3) =877968a(4) =13547688a(5) =174550992a(6) =1997701992a(7) =20732684544a(8) =200430861345
External references
- oeis: A180883