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A158951 Triangle read by rows, A051731 * A158948 2
1, 2, 1, 3, 0, 1, 4, 2, 0, 1, 4, 0, 1, 0, 1, 7, 2, 1, 1, 0, 1, 5, 0, 1, 0, 1, 0, 1, 8, 3, 0, 2, 0, 1, 0, 18, 0, 2, 0, 1, 0, 1, 0, 1, 10, 2, 1, 1, 1, 1, 0, 1, 0, 1 (list; table; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

Row sums = sigma(n), A000203. Left column = A079247

FORMULA

Triangle read by rows, A051731 * A158948

EXAMPLE

First few rows of the triangle =

1;

2, 1;

3, 0, 1;

4, 2, 0, 1;

4, 0, 1, 0, 1;

7, 2, 1, 1, 0, 1;

5, 0, 1, 0, 1, 0, 1;

8, 3, 0, 2, 0, 1, 0, 1;

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

10, 2, 1, 1, 1, 1, 0, 1, 0, 1;

7, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1;

15, 4, 1, 3, 0, 2, 0, 10, 1, 0, 1;

8, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1;

13, 2, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1;

...

CROSSREFS

Cf. A158948, A000203, A051731

Sequence in context: A127094 A158906 A143239 * A126988 A130026 A113287

Adjacent sequences:  A158948 A158949 A158950 * A158952 A158953 A158954

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson & Mats Granvik (qntmpkt(AT)yahoo.com), Mar 31 2009

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Last modified February 13 11:28 EST 2012. Contains 205466 sequences.