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Search: id:A045646
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OFFSET
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0,2
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REFERENCES
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H. J. Hindin, The additive persistence of a number, J. Rec. Math., 7 (No. 2, 1974), 134-135.
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LINKS
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N. J. A. Sloane, The persistence of a number, J. Recreational Math., 6 (1973), 97-98.
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FORMULA
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For n>1 a(n)=2*10^((a(n-1)-1)/9)-1.
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CROSSREFS
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Cf. A003001, A006050.
Sequence in context: A121725 A110368 A006050 this_sequence A023916 A107859 A067524
Adjacent sequences: A045643 A045644 A045645 this_sequence A045647 A045648 A045649
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KEYWORD
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nonn,base,nice
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
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Next term is 1 followed by 2222222222222222222222 9s.
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