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A099175
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a(1) = 1, a(2) = 8; for n > 2: a(n) = a(n-1)*(3*a(n-1)-2).
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1
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1, 8, 176, 92576, 25710762176, 1983129874961075240576, 11798412302889389755255045998938726679954176, 417607598606915139792416465578985202696175989567316713156694229302007260054247019608576
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OFFSET
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1,2
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COMMENTS
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n*(3n-2) is the n-th octagonal number (A000567).
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LINKS
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FORMULA
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MATHEMATICA
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Join[{1}, NestList[ #*(3*# - 2) &, 8, 7]]
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CROSSREFS
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KEYWORD
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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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