login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A305571 Number of diagonal Latin squares with at least one orthogonal mate. 2
1, 0, 0, 48, 480, 0, 1290240, 25484820480 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..8.

E. I. Vatutin, Discussion about properties of diagonal Latin squares at forum.boinc.ru (in Russian)

Index entries for sequences related to Latin squares and rectangles

FORMULA

a(n) = A305570(n) * n!.

a(n) = A274806(n) - A305569(n).

CROSSREFS

Cf. A305569, A305570.

Sequence in context: A259851 A223419 A287762 * A229505 A168351 A198398

Adjacent sequences:  A305568 A305569 A305570 * A305572 A305573 A305574

KEYWORD

nonn,more

AUTHOR

Eduard I. Vatutin, Jun 05 2018

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 16 04:54 EST 2018. Contains 317257 sequences. (Running on oeis4.)