Number of permutations of floor(i*8/7), i=0..n-1, with all sums of 2 through 4 adjacent terms respectively unique.
A147940
Number of permutations of floor(i*8/7), 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) =54a(5) =232a(6) =936a(7) =5070a(8) =25700a(9) =144538a(10) =829398a(11) =4949114a(12) =30028194a(13) =195791072a(14) =1612860652a(15) =13023036794
External references
- oeis: A147940