cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A066329 Binary string which equals n when 1's, 2's, 4's and 8's bits have weights 1, 1, 3, 5 respectively, while the other bits have their usual weights. -1 if no such string exists.

Original entry on oeis.org

0, 1, 11, 100, 101, 1000, 1001, 1011, 1100, 1101, 1111, -1, -1, -1, -1, -1, 10000, 10001, 10011, 10100, 10101, 11000, 11001, 11011, 11100, 11101, 11111, -1, -1, -1, -1, -1, 100000, 100001, 100011, 100100, 100101, 101000, 101001, 101011, 101100, 101101, 101111, -1, -1, -1, -1, -1, 110000, 110001, 110011
Offset: 0

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Author

George E. Antoniou, Dec 15 2001

Keywords

References

  • John M. Yarbrough, Digital Logic Applications and Design, West Publishing, 1997, p. 26

Crossrefs

Cf. A066335.
A120631 is the decimal conversion of these binary strings.

Extensions

More terms from Joshua Zucker, Jun 21 2006
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