Number of permutations of 1..n with the sequence of sums of 2 adjacent elements having exactly 3 maxima.
A179712
Number of permutations of 1..n with the sequence of sums of 2 adjacent elements having exactly 3 maxima.
Terms
- a(0) =0a(1) =20a(2) =700a(3) =12390a(4) =172620a(5) =2112012a(6) =23983344a(7) =260353632a(8) =2749114368a(9) =28553296200a(10) =293791160520
External references
- oeis: A179712