login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A290589
Number of irredundant sets in the n-gear graph.
2
41, 113, 320, 908, 2574, 7317, 20855, 59582, 170681, 490180, 1411207, 4072092, 11774998, 34114389, 99006951, 287783255, 837649471, 2441108294, 7121588680, 20795782761, 60775937523, 177746557324, 520168686310, 1523090681155, 4461852378404, 13076323061624
OFFSET
3,1
LINKS
Eric Weisstein's World of Mathematics, Gear Graph
Eric Weisstein's World of Mathematics, Irredundant Set
CROSSREFS
Sequence in context: A116509 A105389 A266954 * A191867 A195317 A044292
KEYWORD
nonn
AUTHOR
Eric W. Weisstein, Aug 07 2017
EXTENSIONS
a(13)-a(16) from Andrew Howroyd, Aug 11 2017
Missing a(12) inserted and a(17)-a(18) added by Andrew Howroyd, Aug 27 2017
More terms from Christian Sievers, Nov 18 2023
STATUS
approved