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!)
A259791 Number of connected D-integral graphs on n vertices. 0
1, 1, 1, 2, 1, 5, 4, 7, 9, 19 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..10.

Milan Pokorný, et al., On distance integral graphs, Discrete Mathematics, 338 (2015), 1784-1792.

CROSSREFS

Sequence in context: A249905 A171175 A176053 * A325771 A207480 A166517

Adjacent sequences:  A259788 A259789 A259790 * A259792 A259793 A259794

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Jul 06 2015

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 15 12:50 EDT 2021. Contains 342977 sequences. (Running on oeis4.)