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A134543 A134542 * A000012. 1
1, 2, 1, 4, 3, 1, 6, 5, 3, 1, 10, 9, 6, 3, 1, 12, 11, 9, 6, 3, 1, 18, 17, 14, 10, 6, 3, 1, 22, 21, 18, 14, 10, 6, 3, 1, 28, 27, 24, 20, 15, 10, 6, 3, 1, 32, 31, 29, 25, 20, 15, 10, 6, 3, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row sums = A015631: (1, 3, 8, 15, 29, 42,...). Left border = A002088: (1, 2, 4, 6, 10, 12, 18, 22,...). Conjecture: row terms starting from the right tend to the triangular series.

LINKS

Table of n, a(n) for n=1..55.

FORMULA

A134542 * A000012 as infinite lower triangular matrices. Triangle read by rows, partial sums of A134542 terms starting from the right.

EXAMPLE

First few rows of the triangle are:

1;

2, 1;

4, 3, 1;

6, 5, 3, 1;

10, 9, 6, 3, 1;

12, 11, 9, 6, 3, 1;

18, 17, 14, 10, 6, 3, 1;

22, 21, 18, 14, 10, 6, 3, 1;

28, 27, 24, 20, 15, 10, 6, 3, 1;

...

CROSSREFS

Cf. A134542, A002088, A015631.

Sequence in context: A335259 A093682 A187883 * A305540 A197871 A093010

Adjacent sequences:  A134540 A134541 A134542 * A134544 A134545 A134546

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Oct 31 2007

STATUS

approved

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Last modified May 17 06:30 EDT 2021. Contains 343965 sequences. (Running on oeis4.)