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 A071998 Write n in binary, interpret that as a decimal number, convert back to binary. 2
 0, 1, 1010, 1011, 1100100, 1100101, 1101110, 1101111, 1111101000, 1111101001, 1111110010, 1111110011, 10001001100, 10001001101, 10001010110, 10001010111, 10011100010000, 10011100010001, 10011100011010, 10011100011011 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS FORMULA a(n)=A007088(A007088(n)). EXAMPLE n=13: [13]D = [1101]B ==> [1101]D = [10001001101]B = a(13). MATHEMATICA Table[ FromDigits[ IntegerDigits[ FromDigits[ IntegerDigits[n, 2]], 2]], {n, 1, 20}] PROG (PARI) a(n)=subst(Pol(binary(subst(Pol(binary(n)), x, 10))), x, 10) CROSSREFS Cf. A007088. Sequence in context: A123156 A163278 A082461 * A043640 A286138 A145808 Adjacent sequences:  A071995 A071996 A071997 * A071999 A072000 A072001 KEYWORD nonn,base AUTHOR Reinhard Zumkeller, Jun 18 2002 STATUS approved

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Last modified June 13 09:02 EDT 2021. Contains 344981 sequences. (Running on oeis4.)