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.

A324479 Decimal expansion of real number whose continued fraction expansion is [0, 1, 2, 2, 1, 2, 1, 1, 2, 2, 1, 1, 2, 1, 2, 2, 1, ...] (the Thue-Morse sequence A001285).

Original entry on oeis.org

7, 0, 3, 0, 4, 2, 6, 8, 7, 3, 2, 5, 7, 8, 3, 2, 9, 2, 7, 2, 1, 5, 7, 1, 9, 8, 7, 0, 9, 3, 0, 2, 6, 5, 6, 1, 5, 7, 7, 6, 0, 2, 4, 5, 2, 5, 8, 0, 2, 6, 6, 2, 0, 1, 0, 4, 4, 3, 3, 7, 0, 7, 0, 2, 7, 1, 4, 2, 8, 8, 5, 6, 9, 9, 4, 9, 5, 0, 2, 1, 6, 2, 9, 1, 7, 0, 4
Offset: 0

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Author

N. J. A. Sloane, Mar 11 2019

Keywords

Examples

			0.703042687325783292721571987...
		

References

  • J.-P. Allouche and J. Shallit, Automatic Sequences, Cambridge Univ. Press, 2003, p. 399, Th. 13.7.6.

Crossrefs

Cf. A001285.

Programs

  • Mathematica
    RealDigits[FromContinuedFraction[Join[{0}, Nest[Flatten@Join[#, # /. {1 -> 2, 2 -> 1}] &, {1}, 20]]], 10, 100][[1]] (* Amiram Eldar, Mar 11 2019 after Robert G. Wilson v at A001285 *)

Extensions

More terms from Amiram Eldar, Mar 11 2019