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.

Previous Showing 11-14 of 14 results.

A298241 Decimal expansion of BesselI(1,2/3)/BesselI(0,2/3).

Original entry on oeis.org

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

Views

Author

Ilya Gutkovskiy, Jan 15 2018

Keywords

Examples

			0.3160892412682211840956016917105181147668629270070418207...

Links

Crossrefs

Cf. A008585, A052119, A073744, A073747, A073821, A296168, A298242, A298243.

Programs

  • Mathematica
    RealDigits[BesselI[1, 2/3]/BesselI[0, 2/3], 10, 110] [[1]]
RealDigits[Hypergeometric0F1[2, (2/3)^2/4] /(3 Gamma[2] Hypergeometric0F1[1, (2/3)^2/4]), 10, 110][[1]]
  • PARI
    besseli(1,2/3)/besseli(0,2/3) \\ Michel Marcus, Jul 03 2018

Formula

Equals 1/(3 + 1/(6 + 1/(9 + 1/(12 + 1/(15 + 1/(18 + ...)))))).

A298243 Decimal expansion of BesselI(1,2/5)/BesselI(0,2/5).

Original entry on oeis.org

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

Views

Author

Ilya Gutkovskiy, Jan 15 2018

Keywords

Examples

			0.1961038122179955134083610646268785173725058094464270021...

Links

Crossrefs

Cf. A008587, A052119, A073744, A073747, A073821, A296168, A298241, A298242.

Programs

  • Mathematica
    RealDigits[BesselI[1, 2/5]/BesselI[0, 2/5], 10, 110] [[1]]
RealDigits[Hypergeometric0F1[2, (2/5)^2/4]/(5 Gamma[2] Hypergeometric0F1[1, (2/5)^2/4]), 10, 110][[1]]
  • PARI
    besseli(1,2/5)/besseli(0,2/5) \\ Michel Marcus, Jul 03 2018

Formula

Equals 1/(5 + 1/(10 + 1/(15 + 1/(20 + 1/(25 + 1/(30 + ...)))))).

A280091 Pierce Expansion of tanh(1).

Original entry on oeis.org

1, 4, 21, 38, 117, 7135, 7809, 1614095, 3624914, 8425892, 16789093, 18206374, 20026429, 106066483, 297533015, 329807820, 393798971, 762907505, 98220075842, 124475838767, 132042717951, 252079930415, 308550332741, 1938650338119, 10430003444835, 12126839108751
Offset: 1

Views

Author

G. C. Greubel, Dec 25 2016

Keywords

Links

Crossrefs

Cf. A073744 (tanh(1)).

Programs

  • Mathematica
    PierceExp[A_, n_] := Join[Array[1 &, Floor[A]], First@Transpose@ NestList[{Floor[1/Expand[1 - #[[1]] #[[2]]]], Expand[1 - #[[1]] #[[2]]]} &, {Floor[1/(A - Floor[A])], A - Floor[A]}, n - 1]]; PierceExp[N[Tanh[1] , 7!], 50]

A378909 Decimal expansion of 1/sqrt(tanh(1)).

Original entry on oeis.org

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

Views

Author

Stefano Spezia, Dec 10 2024

Keywords

Examples

			1.145877517669027008315306752403764242145795236598...

References

  • Steven R. Finch, Mathematical Constants, Encyclopedia of Mathematics and its Applications, vol. 94, Cambridge University Press, 2003, Section 3.6.5, p. 223.

Links

Crossrefs

Cf. A073744, A073747.

Programs

  • Mathematica
    RealDigits[1/Sqrt[Tanh[1]],10,100][[1]]

Formula

Equals sqrt(A073747). - Hugo Pfoertner, Dec 10 2024
Previous Showing 11-14 of 14 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.