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!)
A141049 Number of n X n binary matrices, symmetric under 180 degree rotation, with rows, considered as binary numbers, in strictly increasing order. 0
1, 2, 3, 32, 138, 4080, 59524, 4687776, 225124336, 51271450616, 8343603385400, 5906858359525200, 3340333500963917624, 7785349019265044794432 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

LINKS

Table of n, a(n) for n=2..15.

CROSSREFS

Sequence in context: A212763 A103108 A107124 * A052830 A041895 A277481

Adjacent sequences:  A141046 A141047 A141048 * A141050 A141051 A141052

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 18 03:25 EDT 2021. Contains 348065 sequences. (Running on oeis4.)