The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A143316 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A143316

Triangle read by rows, A054525 * A143315, 1<=k<=n.
(history; published version)

#6 by Michel Marcus at Mon Aug 14 06:53:35 EDT 2023

STATUS

reviewed

approved

#5 by Joerg Arndt at Mon Aug 14 06:25:41 EDT 2023

STATUS

proposed

reviewed

#4 by Georg Fischer at Mon Aug 14 06:10:22 EDT 2023

STATUS

editing

proposed

#3 by Georg Fischer at Mon Aug 14 06:09:39 EDT 2023

DATA

1, 2, 1, 4, 0, 1, 4, 2, 0, 1, 8, 0, 0, 0, 1, 4, 4, 2, 2, 0, 0, 1, 12, 0, 0, 0, 0, 0, 1, 8, 4, 0, 2, 0, 0, 0, 1, 12, 0, 4, 0, 0, 0, 0, 0, 1, 8, 8, 0, 0, 2, 0, 0, 0, 0, 1, 20, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 8, 4, 4, 4, 0, 2, 0, 0, 0, 0, 0, 1, 24, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 12, 12, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 1

COMMENTS

Row sums = 2n2*n-1.

FORMULA

Triangle read by rows, A054525 * A143315, 1<=k<=n

CROSSREFS

Cf. A143315, A140434, A054525, A140434, A143315.

EXTENSIONS

a(19) corrected and more terms from Georg Fischer, Aug 14 2023

STATUS

approved

editing

Discussion

Mon Aug 14

06:10

Georg Fischer: More terms in order to fill the last row. a(19) was ok in example

#2 by Russ Cox at Fri Mar 30 17:25:31 EDT 2012

AUTHOR

_Gary W. Adamson (qntmpkt(AT)yahoo.com), _, Aug 06 2008

Discussion

Fri Mar 30

17:25

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

#1 by N. J. A. Sloane at Fri Jan 09 03:00:00 EST 2009

NAME

Triangle read by rows, A054525 * A143315, 1<=k<=n.

DATA

OFFSET

1,2

COMMENTS

Row sums = 2n-1

Left border = A140434: (1, 2, 4, 4, 8, 4, 12, 8,...).

FORMULA

Triangle read by rows, A054525 * A143315, 1<=k<=n

EXAMPLE

First few rows of the triangle =

1;

2, 1;

4, 0, 1;

4, 2, 0, 1;

8, 0, 0, 0, 1;

4, 4, 2, 0, 0, 1;

12, 0, 0, 0, 0, 0, 1;

8, 4, 0, 2, 0, 0, 0, 1;

...

CROSSREFS

Cf. A143315, A140434, A054525.

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson (qntmpkt(AT)yahoo.com), Aug 06 2008

STATUS

approved