Number of permutations of floor(i*7/4), i=0..n-1, with all sums of two adjacent terms unique.
A147887
Number of permutations of floor(i*7/4), i=0..n-1, with all sums of two adjacent terms unique.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =24a(4) =96a(5) =528a(6) =2418a(7) =14676a(8) =109882a(9) =996240a(10) =7675118a(11) =67181516a(12) =718155492a(13) =8798220008a(14) =93512144280
External references
- oeis: A147887