A177653 Number of permutations of 4 copies of 1..n avoiding adjacent step pattern up, down, up, up, up

1, 70, 34650, 61414332, 285103911731, 2872521312372990, 55380493659302772963

Offset

1,2

Links

Table of n, a(n) for n=1..7.

Crossrefs

Sequence in context: A177640 A177641 A177648 * A177659 A177665 A177654

Adjacent sequences: A177650 A177651 A177652 * A177654 A177655 A177656

Keyword

nonn

Author

R. H. Hardin May 10 2010

Status

approved