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A140582 Triangle read by rows, A000012 * A140581. 1
1, 2, 1, 4, 1, 1, 4, 2, 1, 1, 8, 2, 1, 1, 1, 5, 4, 2, 1, 1, 1, 11, 4, 2, 1, 1, 1, 1, 11, 4, 2, 2, 1, 1, 1, 1, 11, 4, 4, 2, 1, 1, 1, 1, 1, 6, 8, 4, 2, 2, 1, 1, 1, 1, 1, 16, 8, 4, 2, 1, 1, 1, 1, 1, 1, 16, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 28, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Row sums = A072107: (1, 3, 6, 8, 13, 14,...).

LINKS

Table of n, a(n) for n=0..89.

FORMULA

Triangle read by rows, A000012 * A140581; where A000012 = the infinite lower triangular matrix with all 1's: [1; 1,1; 1,1,1;...].

EXAMPLE

First few rows of the triangle are:

1;

2, 1;

4, 1, 1;

4, 2, 1, 1;

8, 2, 1, 1, 1;

5, 4, 2, 1, 1, 1;

11, 4, 2, 1, 1, 1, 1;

11, 4, 2, 2, 1, 1, 1, 1;

11, 4, 4, 2, 1, 1, 1, 1, 1;

6, 8, 4, 2, 2, 1, 1, 1, 1, 1;

...

CROSSREFS

Cf. A140581, A072107.

Sequence in context: A072918 A255878 A162944 * A062866 A131035 A118745

Adjacent sequences:  A140579 A140580 A140581 * A140583 A140584 A140585

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson and Mats Granvik, May 17 2008

STATUS

approved

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Last modified September 24 11:38 EDT 2020. Contains 337318 sequences. (Running on oeis4.)