login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A086262 Number of n X n conference matrices (including both symmetric and antisymmetric). 2
1, 4, 0, 16, 0, 384, 0, 30720, 0, 2580480, 0, 1486356480, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) = A086260(n) + A086261(n) for n>1.

LINKS

Table of n, a(n) for n=1..13.

Eric Weisstein's World of Mathematics, C-Matrix

CROSSREFS

Cf. A086260, A086261.

Sequence in context: A199572 A003195 A190759 * A167361 A321610 A167314

Adjacent sequences:  A086259 A086260 A086261 * A086263 A086264 A086265

KEYWORD

nonn,more

AUTHOR

Eric W. Weisstein, Jul 14 2003

EXTENSIONS

a(9)-a(13) from Martin Ehrenstein, Oct 08 2021

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 13 18:00 EDT 2022. Contains 356107 sequences. (Running on oeis4.)