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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A119640 Related to number of reachable pairs in a digraph (see Rao article for details). 1
0, 1, 4, 9, 12, 20, 30, 42, 56, 72, 90, 99, 120, 143, 168, 195, 224, 255, 288, 323, 360, 378, 418, 460, 504, 550, 598, 648, 700, 754, 810, 868, 928, 990, 1054, 1085, 1152, 1221, 1292, 1365, 1440, 1517, 1596, 1677, 1760, 1845, 1932, 2021, 2112 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

REFERENCES

A. R. Rao, The number of reachable pairs in a digraph, Discr. Math., 306 (2006), 1595-1600.

LINKS

A. R. Rao, Table of n, a(n) for n = 1..200

CROSSREFS

Sequence in context: A312868 A312869 A256887 * A186130 A051233 A124623

Adjacent sequences:  A119637 A119638 A119639 * A119641 A119642 A119643

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jul 27 2006

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 May 23 20:23 EDT 2019. Contains 323528 sequences. (Running on oeis4.)