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!)
A127186 Number of nonsingular n X n real {0,1}-matrices such that all upper left i X i submatrices are singular for i = 1..n-1. 4
0, 2, 40, 584, 1695296 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

CROSSREFS

Cf. A125587, A125593, A127182, A127183.

Sequence in context: A108033 A160229 A012807 * A139747 A230133 A279214

Adjacent sequences:  A127183 A127184 A127185 * A127187 A127188 A127189

KEYWORD

nonn

AUTHOR

Artur Jasinski, Jan 08 2007

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 February 27 06:59 EST 2020. Contains 332299 sequences. (Running on oeis4.)