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Number of connected non-quadratically embeddable graphs on n nodes.
1

%I #10 Feb 16 2025 08:34:06

%S 0,0,0,0,2,27,401,7943,234182

%N Number of connected non-quadratically embeddable graphs on n nodes.

%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/QuadraticallyEmbeddableGraph.html">Quadratically Embeddable Graph</a>

%F a(n) = A001349(n) - A363960(n).

%Y Cf. A363960 (quadratically embeddable graphs).

%K nonn,more,changed

%O 1,5

%A _Eric W. Weisstein_, Jun 29 2023