A147905 Number of permutations of floor(i*8/5), i=0..n-1, with all sums of 2 through 4 adjacent terms respectively unique.

1, 2, 6, 16, 74, 384, 1970, 10282, 65472, 408096, 3135626, 22226326, 167840010, 1477742556, 12643496462, 132500787090

Offset

1,2

Links

Table of n, a(n) for n=1..16.

Crossrefs

Sequence in context: A147894 A147885 A147914 * A147897 A147889 A345246

Adjacent sequences: A147902 A147903 A147904 * A147906 A147907 A147908

Keyword

nonn

Author

R. H. Hardin, Nov 17 2008

Status

approved