A177655 Number of permutations of 4 copies of 1..n avoiding adjacent step pattern up, up, down, up, up

1, 70, 34044, 59196212, 269545273499, 2664568619404906, 50422744878298794285

Offset

1,2

Links

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

Crossrefs

Sequence in context: A177669 A177667 A177650 * A177663 A177668 A177673

Adjacent sequences: A177652 A177653 A177654 * A177656 A177657 A177658

Keyword

nonn

Author

R. H. Hardin May 10 2010

Status

approved