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A168312 Triangle read by rows, replace 1's of triangle A115361 starting from the right with (1, 2, 4, 8,...). 1
1, 2, 1, 0, 0, 1, 4, 2, 0, 1, 0, 0, 0, 0, 1, 0, 0, 2, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 8, 4, 0, 2, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 2, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 4, 0, 2, 0, 0, 0, 0, 0, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row sums = A038712: (1, 3, 1, 7, 1, 3, 1, 15,...).

LINKS

Table of n, a(n) for n=1..77.

FORMULA

Triangle read by rows, replace 1's in triangle A115361 starting from the right with

(1, 2, 4, 8,...).

EXAMPLE

First few rows of the triangle =

1;

2, 1;

0, 0, 1;

4, 2, 0, 1;

0, 0, 0, 0, 1;

0, 0, 2, 0, 0, 1;

0, 0, 0, 0, 0, 0, 1;

8, 4, 0, 2, 0, 0, 0, 1;

0, 0, 0, 0, 0, 0, 0, 0, 1;

0, 0, 0, 0, 2, 0, 0, 0, 0, 1;

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1;

0, 0, 4, 0, 0, 2, 0, 0, 0, 0, 0, 1;

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1;

0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 1;

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1;

16, 8, 0, 4, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 1;

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1;

...

CROSSREFS

Cf. A115361, A038712

Sequence in context: A145153 A255517 A188816 * A076837 A055363 A110855

Adjacent sequences:  A168309 A168310 A168311 * A168313 A168314 A168315

KEYWORD

nonn,tabf

AUTHOR

Gary W. Adamson, Nov 22 2009

STATUS

approved

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Last modified September 20 17:16 EDT 2020. Contains 337265 sequences. (Running on oeis4.)