Number of permutations of floor(i*7/4), i=0..n-1, with all sums of 2 through 4 adjacent terms respectively unique.
A147903
Number of permutations of floor(i*7/4), 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) =96a(5) =456a(6) =2134a(7) =11650a(8) =74546a(9) =530962a(10) =3437002a(11) =24793292a(12) =214741200a(13) =2028628716a(14) =17460401888a(15) =162168439452
External references
- oeis: A147903