A177667 Number of permutations of 4 copies of 1..n avoiding adjacent step pattern up, down, up, down, up, up

1, 70, 33395, 56878758, 252566336705, 2426875246270330, 44531120457328688514

Offset

1,2

Links

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

Crossrefs

Sequence in context: A177645 A177662 A177669 * A177650 A177655 A177663

Adjacent sequences: A177664 A177665 A177666 * A177668 A177669 A177670

Keyword

nonn

Author

R. H. Hardin May 10 2010

Status

approved