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A144693 Triangle read by rows, A000012 * (3*A144328 - 2*A000012) 1
1, 2, 1, 3, 2, 4, 4, 3, 8, 7, 5, 4, 12, 14, 10, 6, 5, 16, 21, 20, 13, 7, 6, 20, 28, 30, 26, 16, 8, 7, 24, 35, 40, 39, 32, 19, 9, 8, 28, 42, 50, 52, 48, 38, 22, 10, 9, 32, 49, 60, 65, 64, 57, 44, 25, 11, 10, 36, 56, 70, 78, 80, 76, 66, 50, 28 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row sums = A064808: (1, 3, 9, 22, 45, 81, 133,...).

LINKS

Table of n, a(n) for n=1..66.

FORMULA

Triangle read by rows, A000012 * (3*A144328 - 2*A000012)

EXAMPLE

Partial sums by columns of the triangle (3*A144328 - 2*A000012):

1;

1, 1;

1, 1, 4;

1, 1, 4, 7;

1, 1, 4, 7, 10;

...

First few rows of the triangle =

1;

2, 1

3, 2, 4;

4, 3, 8, 7;

5, 4, 12, 14, 10;

6, 5, 16, 21, 20, 13;

7, 6, 20, 28, 30, 26, 16;

8, 7, 24, 35, 40, 39, 32, 19;

...

CROSSREFS

A144328, Cf. A064808

Sequence in context: A008584 A034390 A183912 * A029139 A100927 A001687

Adjacent sequences:  A144690 A144691 A144692 * A144694 A144695 A144696

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Sep 19 2008

STATUS

approved

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Last modified November 17 18:42 EST 2018. Contains 317276 sequences. (Running on oeis4.)