A244888 - OEIS

A244888

Triangle of coefficients arising in study of up-down permutations.

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

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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:

-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