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A204848
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Algebraic cofactor of n-th repunit A002275(n).
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4
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OFFSET
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1,4
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REFERENCES
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Samuel Yates, The Mystique of Repunits, Math. Mag. 51 (1978), 22-28.
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LINKS
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Table of n, a(n) for n=1..10.
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FORMULA
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Equals A002275(n)/(product of terms in n-th row of A204846).
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CROSSREFS
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Cf. A002275, A102380, A204845, A204846, A204847.
Sequence in context: A223513 A160480 A045998 * A027645 A193925 A010190
Adjacent sequences: A204845 A204846 A204847 * A204849 A204850 A204851
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KEYWORD
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nonn,more
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AUTHOR
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N. J. A. Sloane, Jan 19 2012
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STATUS
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approved
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