A329055 - OEIS

A329055

Number of unlabeled bicolored acyclic graphs with n nodes of each color.

1, 2, 6, 21, 82, 356, 1690, 8731, 48213, 281885, 1724817, 10955956, 71747613, 481927039, 3306721747, 23103546417, 163954719933, 1179368199427, 8584854507319, 63150696347462, 468906907743356, 3511055861792836, 26489459993078577, 201226384388401603

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

OFFSET

0,2

COMMENTS

The two color classes are not interchangeable. Adjacent nodes cannot have the same color.

LINKS

Andrew Howroyd, Table of n, a(n) for n = 0..100

CROSSREFS

Main diagonal of A329052.

Sequence in context: A281784 A032347 A032346 * A148495 A150221 A058866

Adjacent sequences: A329052 A329053 A329054 * A329056 A329057 A329058

KEYWORD

nonn

AUTHOR

Andrew Howroyd, Nov 02 2019

STATUS

approved