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 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

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Last modified April 10 22:18 EDT 2021. Contains 342856 sequences. (Running on oeis4.)