A027668 - OEIS

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A027668

Number of independent subsets of nodes of 4^n cube (P_4 X ... X P_4).

2

2, 8, 1234, 121039421240

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,1

LINKS

Table of n, a(n) for n=0..3.

CROSSREFS

Cf. A027624 (P_2), A027667 (P_3).

Sequence in context: A084148 A014115 A014116 * A121015 A216619 A306241

Adjacent sequences: A027665 A027666 A027667 * A027669 A027670 A027671

KEYWORD

nonn,hard,more

AUTHOR

EXTENSIONS

a(0) corrected by Sean A. Irvine, Nov 16 2019

STATUS

approved