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A060631 Number of independent sets in an n-dimensional hypercube modulo symmetries of the hypercube. 0
2, 2, 3, 6, 21, 288, 519195 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..6.

Eric Weisstein's World of Mathematics, Hypercube Graph

Eric Weisstein's World of Mathematics, Independent Vertex Set

EXAMPLE

The six independent sets of the 3-cube are: the empty set, one vertex, two vertices on a common facet, two vertices on opposite corners, three neighbors of a vertex and four vertices of a tetrahedron.

CROSSREFS

Cf. A027624.

Sequence in context: A032908 A192366 A318039 * A275487 A096100 A260161

Adjacent sequences:  A060628 A060629 A060630 * A060632 A060633 A060634

KEYWORD

nonn,nice,more

AUTHOR

David Eppstein, Apr 14 2001

EXTENSIONS

a(6) from Andrew Howroyd, Apr 23 2020

STATUS

approved

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Last modified July 16 13:35 EDT 2020. Contains 335788 sequences. (Running on oeis4.)