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!)
A000516 Number of equivalence classes of n X n matrices over {0,1} with rows and columns summing to 5, where equivalence is defined by row and column permutations. Isomorphism classes of bicolored 5-regular bipartite graphs, where isomorphism cannot exchange the colors. 3
0, 0, 0, 0, 1, 1, 4, 51, 3529, 601055, 156473848, 54062069505, 23869437984682, 13186966476208771, 8971034249976338907, 7414924597575224629299, 7360058177440420943520750, 8683626883245180573511018830, 12066478410398147578519948851818, 19585444567548740264243478805318202 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

LINKS

Table of n, a(n) for n=1..20.

Index entries for sequences related to Latin squares and rectangles

CROSSREFS

Column k=5 of A133687.

Cf. A000512, A000513.

Sequence in context: A210834 A287231 A289708 * A182044 A000854 A232517

Adjacent sequences:  A000513 A000514 A000515 * A000517 A000518 A000519

KEYWORD

nonn,changed

AUTHOR

Eric Rogoyski

EXTENSIONS

Definition corrected by Brendan McKay, May 28 2006

Offset corrected and terms a(12) and beyond from Andrew Howroyd, Apr 01 2020

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 April 8 23:02 EDT 2020. Contains 333331 sequences. (Running on oeis4.)