Number of permutations of floor(i*9/5), i=0..n-1, with all sums of two adjacent terms unique.
A147890
Number of permutations of floor(i*9/5), i=0..n-1, with all sums of two adjacent terms unique.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =24a(4) =96a(5) =444a(6) =3172a(7) =16976a(8) =112790a(9) =839320a(10) =7525858a(11) =86947336a(12) =816752748a(13) =8170308628a(14) =90956874778
External references
- oeis: A147890