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!)
A306839 Number of unimodular n X n matrices with elements {-1, 0, 1}. 0
2, 40, 6960, 10340736, 129599358720 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

S. E. Thornton, Properties of the Bohemian family of n x n matrices with population {-1, 0, 1}, Characteristic Polynomial Database.

CROSSREFS

Sequence in context: A328553 A162868 A059476 * A297385 A261429 A062769

Adjacent sequences:  A306836 A306837 A306838 * A306840 A306841 A306842

KEYWORD

nonn,more,hard

AUTHOR

Steven E. Thornton, Mar 12 2019

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 September 29 09:11 EDT 2020. Contains 337428 sequences. (Running on oeis4.)