login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A213805 Number of 7X7 0..n symmetric arrays with all rows summing to floor(n*7/2) 0
35150, 133721189, 46259653191, 4893373431575, 212962858290086 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A213800

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions for n=4

..2..2..1..2..2..4..1....1..2..2..4..2..0..3....4..4..0..0..3..0..3

..2..4..4..4..0..0..0....2..0..2..3..1..2..4....4..4..0..2..3..0..1

..1..4..3..3..3..0..0....2..2..4..1..4..0..1....0..0..1..1..4..4..4

..2..4..3..4..0..0..1....4..3..1..1..0..2..3....0..2..1..0..3..4..4

..2..0..3..0..1..4..4....2..1..4..0..2..4..1....3..3..4..3..0..1..0

..4..0..0..0..4..2..4....0..2..0..2..4..4..2....0..0..4..4..1..3..2

..1..0..0..1..4..4..4....3..4..1..3..1..2..0....3..1..4..4..0..2..0

CROSSREFS

Sequence in context: A251063 A234988 A075831 * A204491 A085545 A031855

Adjacent sequences:  A213802 A213803 A213804 * A213806 A213807 A213808

KEYWORD

nonn

AUTHOR

R. H. Hardin Jun 20 2012

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 14 19:59 EST 2019. Contains 329128 sequences. (Running on oeis4.)