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 A165145 Partial sums of A058183. 0
 1, 3, 6, 10, 15, 21, 28, 36, 45, 56, 69, 84, 101, 120, 141, 164, 189, 216, 245, 276, 309, 344, 381, 420, 461, 504, 549, 596, 645, 696, 749, 804, 861, 920, 981, 1044, 1109, 1176, 1245, 1316, 1389, 1464, 1541, 1620, 1701, 1784, 1869, 1956, 2045, 2136, 2229, 2324, 2421 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Number of digits of the concatenated first n entries of A007908. LINKS EXAMPLE Example: The 4th number is 10, because the number of digits in the concatenation 1121231234 is 10. MATHEMATICA t=Table[n*(n+1)/2, {n, 53}]; q=9; Add12[l_]:=Table[l[[n+q]]+l[[n]], {n, Length[l]-q}]; Join[Take[t, 9], Add12[t]] (* Vladimir Joseph Stephan Orlovsky, Feb 01 2012 *) PROG (Other) Visual Basic: Function Number(ByVal n As Long) Dim i As Long, b() ReDim b(n) For i = 1 To n b(i) = b(i - 1) + Len(CStr(i)) Number = Number + b(i) Next End Function CROSSREFS Sequence in context: A025746 A119663 A025715 * A046489 A277209 A089717 Adjacent sequences:  A165142 A165143 A165144 * A165146 A165147 A165148 KEYWORD easy,base,nonn AUTHOR Zhining Yang, Sep 05 2009 EXTENSIONS Edited and extended by R. J. Mathar, Sep 06 2009 STATUS approved

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Last modified October 17 14:25 EDT 2018. Contains 316281 sequences. (Running on oeis4.)