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A143808 Triangle read by rows, first n terms of the sequence (1, 2, 4, 10, ...) followed by P(n), where (2, 4, 10, 12, ...) = twice Pell numbers. 1
1, 1, 1, 1, 2, 2, 1, 2, 4, 5, 1, 2, 4, 10, 12, 1, 2, 4, 10, 24, 29, 1, 2, 4, 10, 24, 58, 70, 1, 2, 4, 10, 24, 58, 140, 169, 1, 2, 4, 10, 24, 58, 140, 338, 408, 1, 2, 4, 10, 24, 58, 140, 338, 816, 985 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,5

COMMENTS

Row sums = A000129(n), the Pell numbers: (1, 2, 5, 12, ...).

First few rows of the triangle:

  1;

  1, 1;

  1, 2, 2;

  1, 2, 4, 5;

  1, 2, 4, 10, 12;

  1, 2, 4, 10, 24, 29;

  1, 2, 4, 10, 24, 58, 70;

  1, 2, 4, 10, 24, 58, 140, 169;

LINKS

Table of n, a(n) for n=0..54.

CROSSREFS

Cf. A000129.

Sequence in context: A035364 A261734 A209308 * A294600 A247495 A230290

Adjacent sequences:  A143805 A143806 A143807 * A143809 A143810 A143811

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Sep 01 2008

STATUS

approved

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Last modified February 17 17:59 EST 2020. Contains 331999 sequences. (Running on oeis4.)