Number of permutations of 1..n with the sequence of sums of 2 adjacent elements having exactly 4 maxima.
A179713
Number of permutations of 1..n with the sequence of sums of 2 adjacent elements having exactly 4 maxima.
Terms
- a(0) =0a(1) =70a(2) =8820a(3) =320292a(4) =7850304a(5) =156301992a(6) =2749114368a(7) =44604811680a(8) =685421399520
External references
- oeis: A179713