Number of permutations of floor(i*5/4), i=0..n-1, with all sums of two and three adjacent terms respectively unique.
A147893
Number of permutations of floor(i*5/4), 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) =74a(5) =304a(6) =1424a(7) =6922a(8) =40922a(9) =250670a(10) =1645304a(11) =11152882a(12) =92183062a(13) =780194356a(14) =6842821428a(15) =61855909454
External references
- oeis: A147893