Number of permutations of floor(i*9/5), i=0..n-1, with all sums of 2 through 5 adjacent terms respectively unique.
A147915
Number of permutations of floor(i*9/5), i=0..n-1, with all sums of 2 through 5 adjacent terms respectively unique.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =24a(4) =96a(5) =444a(6) =2508a(7) =13216a(8) =74772a(9) =490758a(10) =3432594a(11) =29784866a(12) =218746780a(13) =1711675050a(14) =14763495624a(15) =145575514096
External references
- oeis: A147915