The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A128971 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A128971

A130125 * A000012.
(history; published version)

#4 by Jon E. Schoenfield at Fri Feb 18 22:26:56 EST 2022

STATUS

editing

approved

#3 by Jon E. Schoenfield at Fri Feb 18 22:26:54 EST 2022

COMMENTS

Left column = A000975: (1, 2, 5, 10, 21, 42, ...). Row sums = A102301: (1, 4, 13, 36, 93, ...). A130127 = A000012 * A130125.

EXAMPLE

First few rows of the triangle are:

1;

2, 2;

5, 4, 4;

10, 10, 8, 8;

21, 20, 20, 16, 16;

42, 42, 40, 40, 32, 32;

85, 84, 84, 80, 80, 64, 64;

...

STATUS

approved

editing

#2 by Russ Cox at Fri Mar 30 17:25:20 EDT 2012

AUTHOR

_Gary W. Adamson (qntmpkt(AT)yahoo.com), _, May 11 2007

Discussion

Fri Mar 30

17:25

OEIS Server: https://oeis.org/edit/global/135

#1 by N. J. A. Sloane at Sat Nov 10 03:00:00 EST 2007

NAME

A130125 * A000012.

DATA

1, 2, 2, 5, 4, 4, 10, 10, 8, 8, 21, 20, 20, 16, 16, 42, 42, 40, 40, 32, 32, 85, 84, 84, 80, 80, 64, 64, 170, 170, 168, 168, 160, 160, 128

OFFSET

0,2

COMMENTS

Left column = A000975: (1, 2, 5, 10, 21, 42,...). Row sums = A102301: (1, 4, 13, 36, 93,...). A130127 = A000012 * A130125.

FORMULA

A130125 * A000012 as infinite lower triangular matrices.

EXAMPLE

First few rows of the triangle are:

1;

2, 2;

5, 4, 4;

10, 10, 8, 8;

21, 20, 20, 16, 16;

42, 42, 40, 40, 32, 32;

85, 84, 84, 80, 80, 64, 64;

...

CROSSREFS

Cf. A000975, A102301, A130127, A000012, A130125.

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson (qntmpkt(AT)yahoo.com), May 11 2007

STATUS

approved