Number of permutations of 1..n with the sequence of sums of 3 adjacent elements having exactly 3 maxima.
A179718
Number of permutations of 1..n with the sequence of sums of 3 adjacent elements having exactly 3 maxima.
Terms
- a(0) =0a(1) =420a(2) =7840a(3) =100800a(4) =1310400a(5) =17255700a(6) =222453000a(7) =2843961120a(8) =36456468048
External references
- oeis: A179718