Number of permutations of 1..n with the sequence of sums of 4 adjacent elements having exactly 1 maximum.
A179720
Number of permutations of 1..n with the sequence of sums of 4 adjacent elements having exactly 1 maximum.
Terms
- a(0) =0a(1) =24a(2) =120a(3) =540a(4) =2520a(5) =12600a(6) =75600a(7) =453600a(8) =2772000a(9) =17001600a(10) =110510400a(11) =714714000a(12) =4666662000
External references
- oeis: A179720