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%I #13 Aug 08 2024 21:08:08
%S 1,1,27,20346417,505719202397835049370570187
%N Chromatic invariant of the n-Sierpinski sieve graph.
%H Andrew Howroyd, <a href="/A295189/b295189.txt">Table of n, a(n) for n = 1..6</a>
%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/ChromaticInvariant.html">Chromatic Invariant</a>.
%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/SierpinskiSieveGraph.html">Sierpinski Sieve Graph</a>.
%Y Cf. A193277.
%K nonn
%O 1,3
%A _Eric W. Weisstein_, Nov 16 2017
%E a(5) onwards from _Andrew Howroyd_, Aug 08 2024
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