Number of labeled 4-colorable (i.e., chromatic number <= 4) graphs on n nodes.

A084280

Number of labeled 4-colorable (i.e., chromatic number <= 4) graphs on n nodes.

Terms

    a(0) =1a(1) =2a(2) =8a(3) =64a(4) =1023a(5) =32596a(6) =2062592a(7) =257798069a(8) =63135260853

External references