Number of 4-chromatic (i.e., chromatic number equals 4) simple graphs on n nodes.

A076280

Number of 4-chromatic (i.e., chromatic number equals 4) simple graphs on n nodes.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =1a(4) =4a(5) =31a(6) =318a(7) =5366a(8) =155291a(9) =7855628a(10) =675054876

External references