The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A172645 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A172645

Number of n X n 0..2 arrays with row sums n and column sums n.
(history; published version)

#8 by Alois P. Heinz at Wed Feb 03 21:40:45 EST 2021

STATUS

editing

approved

#7 by Alois P. Heinz at Wed Feb 03 21:40:39 EST 2021

NAME

Number of n X n 0..2 arrays with row sums n and column sums n.

AUTHOR

R. H. Hardin , Feb 06 2010

STATUS

proposed

editing

#6 by Andrew Howroyd at Wed Feb 03 21:35:10 EST 2021

STATUS

editing

proposed

#5 by Andrew Howroyd at Wed Feb 03 18:00:54 EST 2021

CROSSREFS

Main diagonal of A334549.

STATUS

approved

editing

#4 by Russ Cox at Sat Mar 31 12:35:40 EDT 2012

AUTHOR

_R. H. Hardin (rhhardin(AT)att.net) _ Feb 06 2010

Discussion

Sat Mar 31

12:35

OEIS Server: https://oeis.org/edit/global/875

#3 by N. J. A. Sloane at Thu Nov 11 07:34:06 EST 2010

LINKS

R. H. Hardin, <a href="/A172645/b172645.txt">Table of n, a(n) for n=1..14</a>

KEYWORD

nonn,new

nonn

#2 by N. J. A. Sloane at Sat Oct 02 03:00:00 EDT 2010

KEYWORD

nonn,new

nonn

AUTHOR

Ron R. H. Hardin (rhhardin(AT)att.net) Feb 06 2010

#1 by N. J. A. Sloane at Tue Jun 01 03:00:00 EDT 2010

NAME

Number of n X n 0..2 arrays with row sums n and column sums n

DATA

1, 3, 31, 2371, 1084851, 3680774301, 91358224634433, 17470072106054582211, 26088526624958727703324771, 310419652143758898175543447421953, 29785621316391113552729016416250323294253

OFFSET

1,2

LINKS

R. H. Hardin, <a href="b172645.txt">Table of n, a(n) for n=1..14</a>

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) Feb 06 2010

STATUS

approved