Number of permutations of floor(i*4/3), i=0..n-1, with all sums of two adjacent terms unique.
A147917
Number of permutations of floor(i*4/3), 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) =2140a(7) =11468a(8) =78848a(9) =636700a(10) =4866484a(11) =43893944a(12) =452631554a(13) =4475626268a(14) =50128776656a(15) =625960035472
External references
- oeis: A147917