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A097413
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Initial decimal digit of n^9.
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7
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1, 5, 1, 2, 1, 1, 4, 1, 3, 1, 2, 5, 1, 2, 3, 6, 1, 1, 3, 5, 7, 1, 1, 2, 3, 5, 7, 1, 1, 1, 2, 3, 4, 6, 7, 1, 1, 1, 2, 2, 3, 4, 5, 6, 7, 9, 1, 1, 1, 1, 2, 2, 3, 3, 4, 5, 6, 7, 8, 1, 1, 1, 1, 1, 2, 2, 2, 3, 3, 4, 4, 5, 5, 6, 7, 8, 9, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 4, 4, 5, 5, 6, 6, 7, 8, 9, 1, 1, 1, 1
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OFFSET
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1,2
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LINKS
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FORMULA
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EXAMPLE
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1, 512, 19683, 262144, 1953125, 10077696, 40353607, 134217728, 387420489, 1000000000, ...
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MAPLE
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idd:= n -> floor(n/10^ilog10(n)):
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MATHEMATICA
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Table[IntegerDigits[n^9][[1]], {n, 120}] (* Harvey P. Dale, Aug 25 2023 *)
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CROSSREFS
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Cf. A000027, A000030, A002993, A002994, A004216, A097408, A097409, A097410, A097411, A097412, A097414.
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KEYWORD
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nonn,base,easy
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AUTHOR
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STATUS
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approved
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