Number of permutations of floor(i*4/3), i=0..n-1, with all sums of two and three adjacent terms respectively unique.
A147925
Number of permutations of floor(i*4/3), i=0..n-1, with all sums of two and three adjacent terms respectively unique.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =24a(4) =74a(5) =312a(6) =1620a(7) =7876a(8) =44022a(9) =307314a(10) =2064562a(11) =15229866a(12) =132064084a(13) =1095500280a(14) =10006003984a(15) =104500649736
External references
- oeis: A147925