2,2

a(5) is also the number of edge covers in the 2-Keller graph. - Eric W. Weisstein, Mar 21 2018

Table of n, a(n) for n=2..6.

Eric Weisstein's World of Mathematics, Edge Cover

Eric Weisstein's World of Mathematics, Folded Cube Graph

Eric Weisstein's World of Mathematics, Keller Graph

Sequence in context: A084275 A218377 A258488 * A238566 A241327 A206358

Adjacent sequences: A297049 A297050 A297051 * A297053 A297054 A297055

nonn,more

Eric W. Weisstein, Dec 24 2017

a(5)-a(6) from Andrew Howroyd, Dec 27 2017

approved