Number of permutations of floor(i*4/3), i=0..n-1, with all sums of 2 through 5 adjacent terms respectively unique.
A147943
Number of permutations of floor(i*4/3), i=0..n-1, with all sums of 2 through 5 adjacent terms respectively unique.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =24a(4) =74a(5) =312a(6) =1620a(7) =7876a(8) =41114a(9) =262142a(10) =1532832a(11) =9946476a(12) =74352024a(13) =512825612a(14) =3896130434a(15) =33601759994
External references
- oeis: A147943