The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A067096 Floor[X/Y] where X = concatenation in increasing order of first n even numbers and Y = that of first n natural numbers. 7
 2, 2, 2, 2, 19, 199, 1999, 19991, 199916, 199916, 199916, 199916, 199916, 199916, 199916, 199916, 199916, 199916, 199916, 199916, 199916, 199916, 199916, 199916, 199916, 199916, 199916, 199916, 199916, 199916, 199916, 199916, 199916, 199916 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Almost all terms appear only once.  However, in the first 5000 terms, the term 2 appears 4 times in a row; the term 199916 appears 41 times in a row; the term 19991620000261183803815753482837892477715440187362570807 appears 401 times in a row; and a term with 556 digits (that begins with the same digits as the term that appears 401 times in a row) appears 4001 times in a row.  Does this pattern continue? - Harvey P. Dale, Jul 04 2012 LINKS EXAMPLE a(10) = floor[ 2468101214161820/12345678910] = floor[199916.20000441271803658143252326] = 199916. MATHEMATICA f[n_] := (k = 1; x = y = "0"; While[k < n + 1, x = StringJoin[x, ToString[2^k]]; y = StringJoin[y, ToString[k]]; k++ ]; Return[ Floor[ ToExpression[x] / ToExpression[y]]] ); Table[ f[n], {n, 1, 40} ] ccat[n_, i_]:=FromDigits[Flatten[IntegerDigits/@Range[i, n, i]]]; Table[ Floor[ ccat[2m, 2]/ccat[m, 1]], {m, 40}] (* Harvey P. Dale, Jul 04 2012 *) CROSSREFS Cf. A067088, A067089, A067090, A067091, A067092, A067093, A067094, A067095. floor[A019520(n)/A019519(n)] Sequence in context: A334509 A029643 A100687 * A259704 A249779 A167394 Adjacent sequences:  A067093 A067094 A067095 * A067097 A067098 A067099 KEYWORD easy,nonn,base AUTHOR Amarnath Murthy, Jan 07 2002 EXTENSIONS More terms from Robert G. Wilson v, Jan 09 2002 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified June 23 02:02 EDT 2021. Contains 345395 sequences. (Running on oeis4.)