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A128514 Triangle, Pell sequence in every column. 0
1, 2, 1, 5, 2, 1, 12, 5, 2, 1, 29, 12, 5, 2, 1, 70, 29, 12, 5, 2, 1, 169, 70, 29, 12, 5, 2, 1, 408, 169, 70, 29, 12, 5, 2, 1, 985, 408, 169, 70, 29, 12, 5, 2, 1, 2378, 985, 408, 169, 70, 29, 12, 5, 2, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row sums = A048739 starting (1, 3, 8, 20, 49, 119,...)

Riordan array (1/(1-2x-x^2),x). [From Philippe Deléham, Apr 23 2009]

LINKS

Table of n, a(n) for n=1..55.

FORMULA

A000129 in every column: (1, 2, 5, 12, 29,...)

EXAMPLE

First few rows of the triangle are:

1;

2, 1;

5, 2, 1;

12, 5, 2, 1;

29, 12, 5, 2, 1;

70, 29, 12, 5, 2, 1;

...

CROSSREFS

Cf. A000129, A048739.

Sequence in context: A105084 A126125 A221876 * A126075 A134032 A137151

Adjacent sequences:  A128511 A128512 A128513 * A128515 A128516 A128517

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Mar 05 2007

STATUS

approved

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Last modified November 14 09:49 EST 2018. Contains 317182 sequences. (Running on oeis4.)