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A208152 Triangle by rows, generated from the Ruler sequence A001511. 0
1, 1, 1, 3, 2, 1, 6, 4, 1, 1, 24, 16, 4, 3, 1, 48, 32, 8, 6, 1, 1, 144, 96, 24, 18, 3, 2, 1, 188, 192, 48, 36, 6, 4, 1, 1, 1440, 960, 240, 180, 30, 20, 5, 4, 1, 2880, 1920, 480, 360, 60, 10, 8, 1, 1, 8640, 5760, 1440, 1080, 180, 120, 30, 24, 3, 2, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Row sums = A208147: (1, 2, 6, 12, 48, 96, 288, ...).

LINKS

Table of n, a(n) for n=1..65.

FORMULA

Inverse of:

1;

-1, 1;

-1, -2, 1;

-1, -2, -1, 1;

-1, -2, -1, -3, 1;

-1, -2, -1, -3, -1, 1;

-1, -2, -1, -3, -1, -2, 1;

..., where the signed terms are negatives of A001511 terms: (1, 2, 1, 3, 1, 2, 1, 4, ...).

EXAMPLE

First few rows of the triangle =

1;

1, 1;

3, 2, 1;

6, 4, 1, 1;

24, 16, 4, 3, 1;

48, 32, 8, 6, 1, 1;

144, 96, 24, 18, 3, 2, 1;

288, 192, 48, 36, 6, 4, 1, 1;

1440, 960, 240, 180, 30, 20, 5, 4, 1;

2880, 1920, 480, 360, 60, 40, 10, 8, 1, 1;

8640, 5760, 1440, 1080, 180, 120, 30, 24, 3, 2, 1;

...

CROSSREFS

Cf. A001511, A208147.

Sequence in context: A323417 A102189 A031252 * A194761 A129674 A120771

Adjacent sequences: A208149 A208150 A208151 * A208153 A208154 A208155

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Feb 23 2012

STATUS

approved

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Last modified January 30 19:55 EST 2023. Contains 359947 sequences. (Running on oeis4.)