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A143470 Triangle read by rows, A000012 * A143316, 1<=k<=n. 1
1, 3, 1, 7, 1, 1, 11, 3, 1, 1, 19, 3, 1, 1, 1, 23, 7, 3, 1, 1, 1, 35, 7, 3, 1, 1, 1, 43, 11, 3, 3, 1, 1, 1, 1, 55, 11, 7, 3, 1, 1, 1, 1, 1, 63, 19, 7, 3, 31, 1, 1, 1, 1, 83, 19, 7, 3, 3, 1, 1, 1, 1, 1, 1, 91, 23, 11, 7, 3, 3, 1, 1, 1, 1, 1, 1, 115, 23, 11, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row sums = n^2

LINKS

Table of n, a(n) for n=1..89.

FORMULA

Triangle read by rows, A000012 * A143316, 1<=k<=n, where the operation A000012 * A143316 takes partial sums of A143316 terms by columns.

EXAMPLE

First few rows of the triangle =

1;

3, 1;

7, 1, 1;

11, 3, 1, 1;

19, 3, 1, 1, 1;

23, 7, 3, 1, 1, 1;

35, 7, 3, 1, 1, 1, 1;

...

CROSSREFS

Cf. A143316.

Sequence in context: A272030 A026499 A242114 * A114580 A257597 A097229

Adjacent sequences:  A143467 A143468 A143469 * A143471 A143472 A143473

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Aug 17 2008

STATUS

approved

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Last modified January 20 17:47 EST 2018. Contains 297961 sequences.