Number of arrays of length n that are sums of 2 consecutive elements of length n+1 permutations of 0..n.
A229560
Number of arrays of length n that are sums of 2 consecutive elements of length n+1 permutations of 0..n.
Terms
- a(0) =1a(1) =6a(2) =16a(3) =120a(4) =648a(5) =5040a(6) =38592a(7) =362880a(8) =3600000a(9) =39916800a(10) =476928000a(11) =6227020800a(12) =87127488000
External references
- oeis: A229560