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!)
A141051 Number of symmetric n X n binary matrices with rows, considered as binary numbers, in strictly increasing order. 0
3, 9, 48, 438, 6774, 178263, 8064528, 635233629, 88262479353, 21895746114393, 9802094635734609, 7991530444822867188, 11958178763325581795193, 33058393812927903895526529, 169791780269023089222297799203, 1628050027945868401705569575523453 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..17.

CROSSREFS

Sequence in context: A306947 A183952 A298308 * A001530 A316449 A190009

Adjacent sequences:  A141048 A141049 A141050 * A141052 A141053 A141054

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 31 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 October 20 22:22 EDT 2021. Contains 348119 sequences. (Running on oeis4.)