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A241156
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Number of complementary pairs of `homogenized' N-free graphs with n nodes.
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1
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1, 1, 2, 7, 22, 82, 308, 1225, 4954, 20558, 86572, 369942, 1598172, 6972100, 30663656, 135826627, 605386062, 2713066882, 12217967284, 55262144418, 250932354484, 1143468874748, 5227460728344, 23968152050930, 110191808568852, 507857114699628
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OFFSET
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1,3
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LINKS
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FORMULA
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a(1)=1, thereafter a(n) = A226909(n)/2.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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