login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A183404 Number of nX3 binary arrays with each sum of a(1..i,1..j) no greater than i*j/2 1
3, 21, 114, 850, 5354, 40832, 274911, 2120988, 14827787, 115207396, 825114785, 6441358454, 46915800558, 367505583063, 2710102446879, 21283753145043, 158451414945246, 1246900992786465, 9352863302296454, 73719397766360957 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A183407

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..46

EXAMPLE

Some solutions for 4X3

..0..0..0....0..0..0....0..0..1....0..0..0....0..0..0....0..1..0....0..0..1

..0..0..0....1..0..0....0..1..0....0..0..1....1..0..1....0..1..0....0..1..0

..0..1..0....0..0..0....0..0..1....1..1..0....0..1..1....0..1..0....0..0..0

..0..1..0....1..1..1....0..0..0....1..1..1....1..0..1....0..0..0....1..1..1

CROSSREFS

Sequence in context: A043012 A122120 A080952 * A309670 A121140 A005057

Adjacent sequences:  A183401 A183402 A183403 * A183405 A183406 A183407

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 04 2011

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 4 19:10 EDT 2022. Contains 357239 sequences. (Running on oeis4.)