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A049309
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Number of nonisomorphic self-complementary circulant digraphs (Cayley digraphs for the cyclic group) of order 2n-1.
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3
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1, 1, 2, 2, 3, 4, 8, 20, 20, 30, 88, 94, 214, 457, 596, 1096, 3280, 5560, 7316, 21944, 26272, 49940
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OFFSET
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1,3
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COMMENTS
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There is an easy formula for prime orders. Formulae are also known for squarefree and prime-squared orders.
Further values for squarefree and prime-squared orders can be found in the Liskovets reference.
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CROSSREFS
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KEYWORD
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nice,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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