A177649 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A177649

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

1, 70, 31830, 50395146, 205822250572, 1808558575291438, 30242498188745996934

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

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

CROSSREFS

Sequence in context: A177642 A177644 A146499 * A177651 A177645 A177662

Adjacent sequences: A177646 A177647 A177648 * A177650 A177651 A177652

KEYWORD

nonn

AUTHOR

R. H. Hardin May 10 2010

STATUS

approved