a(n) is the number of labeled triangle-free simple graphs on n vertices.

A213434

a(n) is the number of labeled triangle-free simple graphs on n vertices.

Terms

    a(0) =1a(1) =2a(2) =7a(3) =41a(4) =388a(5) =5789a(6) =133501a(7) =4682270a(8) =246348115a(9) =19213627145

External references