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A160939
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a(n) = n + digital sum (n-1).
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4
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1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 78
(list;
graph;
refs;
listen;
history;
text;
internal format)
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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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Writing ds() for the sum of digits (A007953),
a(8) = 8 + ds(7) = 8 + 7 = 15,
a(15) = 15 + ds(14) = 15 + 5 = 20,
a(26) = 26 + ds(25) = 26 + 7 = 33.
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MATHEMATICA
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Table[n+Total[IntegerDigits[n-1]], {n, 80}] (* Harvey P. Dale, Dec 08 2012 *)
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PROG
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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