Number of permutations of floor(i*7/5), i=0..n-1, with all sums of two adjacent terms unique.
A147921
Number of permutations of floor(i*7/5), 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) =372a(6) =2116a(7) =13376a(8) =91944a(9) =651888a(10) =5780164a(11) =51776784a(12) =517517604a(13) =5477813312a(14) =59576133472a(15) =755631632616
External references
- oeis: A147921