Number of permutations of floor(i*5/4), i=0..n-1, with all sums of 2 through 4 adjacent terms respectively unique.
A147902
Number of permutations of floor(i*5/4), i=0..n-1, with all sums of 2 through 4 adjacent terms respectively unique.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =16a(4) =74a(5) =304a(6) =1424a(7) =6554a(8) =36720a(9) =207648a(10) =1262922a(11) =7739400a(12) =57383696a(13) =429424444a(14) =3331954076a(15) =26331934036
External references
- oeis: A147902