Number of permutations of floor(i*9/8), i=0..n-1, with all sums of two and three adjacent terms respectively unique.
A147899
Number of permutations of floor(i*9/8), i=0..n-1, with all sums of two and three adjacent terms respectively unique.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =16a(4) =54a(5) =232a(6) =936a(7) =4136a(8) =25518a(9) =153608a(10) =989110a(11) =6834648a(12) =49015240a(13) =365663988a(14) =2898743824a(15) =24274925344
External references
- oeis: A147899