login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A140309 Number of n X n binary matrices containing no more than six 1s in any 3 X 3 sub-block. 0
1, 2, 16, 466, 51512, 21425198, 32840182186, 188637643581570, 4048457379398984078, 323937479341259299455434, 96758393657902322435446080112 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..10.

CROSSREFS

Cf. A139810.

Sequence in context: A012146 A113109 A223563 * A201383 A306816 A012461

Adjacent sequences:  A140306 A140307 A140308 * A140310 A140311 A140312

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 27 2008

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 28 13:03 EST 2021. Contains 349408 sequences. (Running on oeis4.)