Number of connected labeled 3-colorable (i.e., chromatic number <= 3) graphs on n nodes.

A084283

Number of connected labeled 3-colorable (i.e., chromatic number <= 3) graphs on n nodes.

Terms

    a(0) =1a(1) =1a(2) =4a(3) =37a(4) =667a(5) =21886a(6) =1262719a(7) =125387767a(8) =21009091072

External references