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A144515 Triangle read by rows: A051731 * A103451. +0
2
1, 2, 1, 2, 0, 1, 3, 1, 0, 1, 2, 0, 0, 0, 1, 4, 1, 1, 0, 0, 1, 2, 0, 0, 0, 0, 0, 1, 4, 1, 0, 1, 0, 0, 0, 1, 3, 0, 1, 0, 0, 0, 0, 0, 1, 4, 1, 0, 0, 1, 0, 0, 0, 0, 1 (list; table; graph; listen)
OFFSET

0,2

COMMENT

Row sums = A114003: (1, 3, 3, 5, 3, 7, 3, 7, 5, 7,...).

Left border = d(n), A000005: (1, 2, 2, 3, 2, 4, 2, 4,...).

FORMULA

A051731 * A103451 as infinite lower triangular matrices. Left border of A051731 (all 1's) is replaced with A000005: (1, 2, 2, 3, 2, 4,...).

EXAMPLE

First few rows of the triangle are:

1;

2, 1;

2, 0, 1;

3, 1, 0, 1;

2, 0, 0, 0, 1;

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

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

...

CROSSREFS

Cf. A114003, A000005, A103451.

Sequence in context: A049986 A137289 A063574 this_sequence A028933 A143352 A127170

Adjacent sequences: A144512 A144513 A144514 this_sequence A144516 A144517 A144518

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson (qntmpkt(AT)yahoo.com), Nov 21 2007

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.


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