Number of permutations of floor(i*7/3), i=0..n-1, with all sums of two adjacent terms unique.
A147920
Number of permutations of floor(i*7/3), i=0..n-1, with all sums of two adjacent terms unique.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =24a(4) =74a(5) =368a(6) =2434a(7) =12876a(8) =95120a(9) =838244a(10) =6232926a(11) =59671520a(12) =674514660a(13) =6450680100a(14) =77573342320
External references
- oeis: A147920