Number of permutations of floor(i*9/5), i=0..n-1, with all sums of two and three adjacent terms respectively unique.
A147898
Number of permutations of floor(i*9/5), 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) =96a(5) =444a(6) =2508a(7) =13216a(8) =81030a(9) =566512a(10) =4383340a(11) =43168552a(12) =356745786a(13) =3125719866a(14) =30567653042a(15) =349720370632
External references
- oeis: A147898