login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A244888 Triangle of coefficients arising in study of up-down permutations. 1
1, -2, 1, 6, -6, 1, -23, 36, -15, 1, 106, -229, 160, -37, 1, -567, 1574, -1566, 650, -93, 1, 3434, -11706, 15248, -9310, 2572, -238, 1, -23137, 93831, -151933, 123814, -52136, 10175, -616, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

See Remmel (2014) for precise definition.

LINKS

Table of n, a(n) for n=1..36.

Jeffrey B. Remmel, Consecutive Up-down Patterns in Up-down Permutations, Electron. J. Combin., 21 (2014), #P3.2. See p. 25.

EXAMPLE

Triangle begins:

       1;

      -2,      1;

       6,     -6,       1;

     -23,     36,     -15,      1;

     106,   -229,     160,    -37,      1;

    -567,   1574,   -1566,    650,    -93,     1;

    3434, -11706,   15248,  -9310,   2572,  -238,    1;

  -23137,  93831, -151933, 123814, -52136, 10175, -616, 1;

  ...

CROSSREFS

First two columns are A125273 and A244889.

Sequence in context: A260848 A110183 A110098 * A130561 A157400 A091599

Adjacent sequences:  A244885 A244886 A244887 * A244889 A244890 A244891

KEYWORD

sign,tabl

AUTHOR

N. J. A. Sloane, Jul 12 2014

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 12 10:17 EDT 2021. Contains 343821 sequences. (Running on oeis4.)