This site is supported by donations to The OEIS Foundation.

 Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing. Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A108237 Erase the odd-indexed digits of the sequence and concatenate what is left. The result is the concatenation of all integers of the sequence. 0
 11, 21, 22, 31, 32, 42, 43, 51, 53, 62, 64, 72, 74, 83, 85, 91, 95, 131, 612, 1614, 1712, 1714, 1813, 1815, 1911, 1915, 2113, 2116, 2122, 2126, 2134, 2137, 2142, 2147, 2154, 2158, 2163, 2168, 2175, 2179, 2181, 2189, 2195, 2211, 3113, 3211, 4116, 4211, 4212 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS Fractal slowest increasing such sequence. LINKS EXAMPLE Sequence : 11,21,22,31,32,42,43,51,53,62,64,72,74,83,... To erase :.*..*..*..*..*..*..*..*..*..*..*..*..*..*... To keep .:..1..1..2..1..2..2..3..1..3..2..4..2..4..3... leaving .:...11,...21,...22,...31,...32,...42,...43... so when you concatenate all "kept digits" you get the concatenation of all integers of the original sequence. CROSSREFS Sequence in context: A031032 A279769 A084854 * A084906 A232184 A232185 Adjacent sequences:  A108234 A108235 A108236 * A108238 A108239 A108240 KEYWORD base,easy,nonn AUTHOR Eric Angelini, Jun 17 2005 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 December 15 20:00 EST 2019. Contains 330000 sequences. (Running on oeis4.)