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Search: id:A079050
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| A079050 |
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Sum of the digits of LookAndSay(n). |
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+0
1
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| 2, 3, 4, 5, 6, 7, 8, 9, 10, 3, 3, 5, 6, 7, 8, 9, 10, 11, 12, 4, 5, 4, 7, 8, 9, 10, 11, 12, 13, 5, 6, 7, 5, 9, 10, 11, 12, 13, 14, 6, 7, 8, 9, 6, 11, 12, 13, 14, 15, 7, 8, 9, 10, 11, 7, 13, 14, 15, 16, 8, 9, 10, 11, 12, 13, 8, 15, 16, 17, 9, 10, 11, 12, 13, 14, 15, 9, 17, 18, 10, 11, 12, 13
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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LookAndSay(23) = 1213, the sum of whose digits = 7, so a(23) = 7.
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MATHEMATICA
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lookandsay[n_] := Module[{r, d, f, i, l, k}, r = ""; d = IntegerDigits[n]; While[d != {}, f = First[d]; i = 2; l = Length[d]; While[i <= l && d[[i]] == f, i = i + 1]; k = i - 1; r = r <> ToString[k]; r = r <> ToString[f]; d = Drop[d, k]]; ToExpression[r]]; t = Table[Apply[Plus, IntegerDigits[lookandsay[i]]], {i, 1, 100}]
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CROSSREFS
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Sequence in context: A043270 A089898 A071785 this_sequence A064698 A094175 A048893
Adjacent sequences: A079047 A079048 A079049 this_sequence A079051 A079052 A079053
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KEYWORD
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base,nonn
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AUTHOR
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Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Feb 02 2003
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