Number of permutations of floor(i*4/3), i=0..n-1, with all sums of 2 through 4 adjacent terms respectively unique.
A147934
Number of permutations of floor(i*4/3), i=0..n-1, with all sums of 2 through 4 adjacent terms respectively unique.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =24a(4) =74a(5) =312a(6) =1620a(7) =7876a(8) =41114a(9) =262142a(10) =1640026a(11) =10906856a(12) =84761678a(13) =627751836a(14) =5070873342a(15) =46757075664
External references
- oeis: A147934