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!)
A047940 Number of 5-colorings of an n X n grid, up to rotational symmetry. 3
1, 5, 165, 489125, 38147070625, 74505806274453125, 3637978807092666626953125, 4440892098500626236200333251953125, 135525271560688054250937420874834136962890625, 103397576569128459358926086520114040467888355255126953125 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Andrew Howroyd, Table of n, a(n) for n = 0..25

FORMULA

a(n) = (m^(n^2) + 2 m^((n^2 + 3 (n mod 2))/4) + m^((n^2 + (n mod 2))/2))/4, with m = 5.

CROSSREFS

Column k=5 of A343095.

Cf. A054752, A047937.

Sequence in context: A203185 A129995 A259613 * A229414 A210923 A229524

Adjacent sequences: A047937 A047938 A047939 * A047941 A047942 A047943

KEYWORD

nonn

AUTHOR

Rob Pratt

EXTENSIONS

Terms a(9) and beyond from Andrew Howroyd, Apr 14 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 March 25 08:54 EDT 2023. Contains 361520 sequences. (Running on oeis4.)