Number of permutations of floor(i*5/2), i=0..n-1, with all sums of two adjacent terms unique.
A147885
Number of permutations of floor(i*5/2), i=0..n-1, with all sums of two adjacent terms unique.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =16a(4) =74a(5) =368a(6) =2016a(7) =12168a(8) =85462a(9) =646544a(10) =5510236a(11) =49722456a(12) =500178548a(13) =5288883744a(14) =60900708056a(15) =733070993472
External references
- oeis: A147885