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 A190480 Concatenation of first n digits in the concatenation of first n primes written in base 2. 22
 1, 10, 101, 1011, 10111, 101110, 1011101, 10111011, 101110111, 1011101111, 10111011111, 101110111110, 1011101111101, 10111011111011, 101110111110111, 1011101111101111, 10111011111011110, 101110111110111101, 1011101111101111011 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS The terms are 1, 2, 5, 11, 23, 46, 93, 185, 375, ... in decimal. The terms are the first n digits of the concatenation 10//11//101//111//1011//1101//.. generated with A004676. LINKS Table of n, a(n) for n=1..19. MATHEMATICA With[{cc=Flatten[Table[IntegerDigits[p, 2], {p, Prime[ Range[ 10]]}]]}, Table[ FromDigits[Take[cc, n]], {n, Length[cc]}]] (* Harvey P. Dale, Jan 26 2021 *) CROSSREFS Cf. A019518. Sequence in context: A266720 A033128 A094945 * A267623 A283508 A261200 Adjacent sequences: A190477 A190478 A190479 * A190481 A190482 A190483 KEYWORD nonn,easy,base AUTHOR Juri-Stepan Gerasimov, May 24 2011 STATUS approved

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Last modified May 26 02:25 EDT 2024. Contains 372807 sequences. (Running on oeis4.)