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 A291962 Decimal repunits written in base 2. 9
 0, 1, 1011, 1101111, 10001010111, 10101101100111, 11011001000000111, 100001111010001000111, 101010011000101011000111, 110100111110110101111000111, 1000010001110100011010111000111, 1010010110010001100001100111000111, 1100111011110101111010000000111000111 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS Interpreting A002275 as binary numbers and converting to decimal gives A000225. This sequence gives the resulting terms of the "reverse" operation. The n least significant bits of a(n) seem to converge to A088911 as n increases. LINKS Seiichi Manyama, Table of n, a(n) for n = 0..301 FORMULA a(n) = A007088(A002275(n)). MATHEMATICA Table[FromDigits@ IntegerDigits[Floor[10^n/9], 2], {n, 0, 12}] (* Michael De Vlieger, Sep 06 2017 *) FromDigits[IntegerDigits[#, 2]]&/@Table[FromDigits[PadRight[{}, n, 1]], {n, 0, 20}] (* Harvey P. Dale, Apr 01 2023 *) PROG (PARI) a(n) = subst(Pol(binary((10^n-1)/9)), x, 10) (Python) def a(n): return 0 if n == 0 else int(bin(int("1"*n))[2:]) print([a(n) for n in range(13)]) # Michael S. Branicky, Apr 26 2022 CROSSREFS Cf. A000225, A002275, A007088, A088911. Sequence in context: A267613 A178396 A178349 * A094946 A158877 A159774 Adjacent sequences: A291959 A291960 A291961 * A291963 A291964 A291965 KEYWORD nonn,base,easy AUTHOR Felix Fröhlich, Sep 06 2017 STATUS approved

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Last modified April 16 00:45 EDT 2024. Contains 371696 sequences. (Running on oeis4.)