Number of permutations of floor(i*9/7), i=0..n-1, with all sums of two and three adjacent terms respectively unique.
A147933
Number of permutations of floor(i*9/7), i=0..n-1, with all sums of two and three adjacent terms respectively unique.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =16a(4) =74a(5) =304a(6) =1424a(7) =7946a(8) =44418a(9) =271160a(10) =1760020a(11) =13590836a(12) =107901418a(13) =882093328a(14) =8656696052a(15) =83441646558
External references
- oeis: A147933