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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A010549 Decimal expansion of square root of 98.

Original entry on oeis.org

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

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Keywords

Comments

Continued fraction expansion is 9 followed by {1, 8, 1, 18} repeated. - Harry J. Smith, Jun 12 2009
7*2^(1/2) = sqrt(98) is also the maximum width of the arms of the cellular automaton described in A294020. - Omar E. Pol, Oct 29 2017

Examples

			9.899494936611665341611821069467886549987703127638636512236758165935127...
		

Crossrefs

Cf. A010169 Continued fraction.

Programs

  • Mathematica
    RealDigits[N[Sqrt[98],200]][[1]] (* Vladimir Joseph Stephan Orlovsky, Feb 05 2012 *)
    RealDigits[Sqrt[98],10,120][[1]] (* Harvey P. Dale, May 21 2023 *)
  • PARI
    { default(realprecision, 20080); x=sqrt(98); for (n=1, 20000, d=floor(x); x=(x-d)*10; write("b010549.txt", n, " ", d)); } \\ Harry J. Smith, Jun 12 2009

Extensions

Final digits of sequence corrected using the b-file. - N. J. A. Sloane, Aug 30 2009
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