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0, 6, 72, 648, 5184, 38880, 279936, 1959552, 13436928, 90699264, 604661760, 3990767616, 26121388032, 169789022208, 1097098297344, 7052774768640, 45137758519296, 287753210560512, 1828079220031488, 11577835060199424, 73123168801259520, 460675963447934976
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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LINKS
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FORMULA
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Sum_{n>=1} 1/a(n) = log(6/5).
Sum_{n>=1} (-1)^(n+1)/a(n) = log(7/6). (End)
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MAPLE
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MATHEMATICA
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PROG
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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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