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A013814
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a(n) = 21^(4*n + 1).
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1
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21, 4084101, 794280046581, 154472377739119461, 30041942495081691894741, 5842587018385982521381124421, 1136272165922724266740722458520501, 220983347100817338120002444455525554981, 42977062327514056734916195400155065458259861
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OFFSET
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0,1
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LINKS
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PROG
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(Maxima) makelist(21^(4*n+1), n, 0, 20); /* Martin Ettl, Oct 21 2012 */
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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