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A199550
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Decimal expansion of the positive root of x^x^x = 2.
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2
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1, 4, 7, 6, 6, 8, 4, 3, 3, 7, 3, 5, 7, 8, 6, 9, 9, 4, 7, 0, 8, 9, 2, 3, 5, 5, 8, 5, 3, 7, 3, 8, 8, 9, 8, 3, 8, 6, 5, 5, 1, 6, 8, 9, 3, 0, 9, 8, 5, 5, 2, 6, 9, 8, 4, 4, 6, 4, 4, 0, 3, 1, 4, 7, 6, 2, 1, 6, 9, 8, 0, 0, 2, 9, 1, 8, 8, 2, 1, 5, 2, 8, 5, 9, 7, 1, 4, 7, 2, 4, 0, 8, 4, 4, 0, 2, 6, 9, 5, 7, 9, 8, 3, 2, 2
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OFFSET
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1,2
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COMMENTS
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As follows from Gelfond's theorem, the root is irrational, so this sequence is infinite and aperiodic. Its transcendence is, apparently, still an open problem. - Vladimir Reshetnikov, Apr 27 2013
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LINKS
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EXAMPLE
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1.4766843373578699470892355853738898386551689309855269844644...
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MATHEMATICA
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First[RealDigits[Root[{Function[x, x^x^x - 2], 1.477`4}], 10, 100]]
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PROG
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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