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A131327 Triangle |4*|A049310(n,k)| - 3| read by rows, 0<=k<=n. 4
1, 3, 1, 1, 3, 1, 3, 5, 3, 1, 1, 3, 9, 3, 1, 3, 9, 3, 13, 3, 1, 1, 3, 21, 3, 17, 3, 1, 3, 13, 3, 37, 3, 21, 3, 1, 1, 3, 37, 3, 57, 3, 25, 3, 1, 3, 17, 3, 77, 3, 81, 3, 29, 3, 1, 1, 3, 57, 3, 137, 3, 109, 3, 33, 3, 1, 3, 21, 3, 137, 3, 221, 3, 141, 3, 37, 3, 1, 1, 3, 81, 3, 277, 3, 333, 3, 177 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..86.

EXAMPLE

First few rows of the triangle are:

1;

3, 1;

1, 3, 1;

3, 5, 3, 1;

1, 3, 9, 3, 1;

3, 9, 3, 13, 3, 1;

1, 3, 21, 3, 17, 3, 1;

...

MAPLE

A131327 := proc(n, k)

    abs(4*abs(A049310(n, k))-3) ;

end proc:

seq(seq(A131327(n, k), k=0..n), n=0..12) ; # R. J. Mathar, Aug 13 2012

CROSSREFS

Cf. A049310, A131328 (row sums), A131324, A131325, A131326.

Sequence in context: A131781 A082465 A226856 * A122506 A010274 A137728

Adjacent sequences:  A131324 A131325 A131326 * A131328 A131329 A131330

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Jun 28 2007

EXTENSIONS

Definition corrected. - R. J. Mathar, Aug 13 2012

STATUS

approved

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Last modified June 18 17:05 EDT 2019. Contains 324214 sequences. (Running on oeis4.)