A290589 Number of irredundant sets in the n-gear graph.

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

Christian Sievers, Table of n, a(n) for n = 3..200

Eric Weisstein's World of Mathematics, Gear Graph

Eric Weisstein's World of Mathematics, Irredundant Set

Crossrefs

Cf. A290378, A290640.

Sequence in context: A116509 A105389 A266954 * A191867 A195317 A044292

Adjacent sequences: A290586 A290587 A290588 * A290590 A290591 A290592

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