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 31-40 of 74 results. Next

A021310 Decimal expansion of 1/306.

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane

Keywords

Examples

			0.003267973856209150326797385620915032679738562...

Links

Crossrefs

Cf. A021106, A021157.

Programs

  • Mathematica
    realDigitsRecip[306] (* The realDigitsRecip program is at A021200 *) (* Harvey P. Dale, Oct 01 2024 *)

Formula

G.f.: x^2*(5*x^14 + x^13 + 9*x^12 + 2*x^10 + 6*x^9 + 5*x^8 + 8*x^7 + 3*x^6 + 7*x^5 + 9*x^4 + 7*x^3 + 6*x^2 + 2*x + 3)/(1 - x^16). - Chai Wah Wu, Jun 21 2016

A021409 Decimal expansion of 1/405.

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane

Keywords

Links

Programs

  • Mathematica
    realDigitsRecip[405] (* The realDigitsRecip program is at A021200 *) (* or *) PadRight[{0},120,{8,0,2,4,6,9,1,3,5}] (* Harvey P. Dale, Nov 21 2024 *)

A021421 Decimal expansion of 1/417.

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane

Keywords

Links

Programs

  • Mathematica
    realDigitsRecip[417] (* The realDigitsRecip program is at A021200 *) (* Harvey P. Dale, Jul 18 2025 *)

Formula

From Chai Wah Wu, Sep 04 2025: (Start)
a(n) = a(n-46) for n > 45.
G.f.: x^2*(-7*x^43 - 4*x^42 - 2*x^41 - x^40 - 4*x^39 - 4*x^38 - 8*x^37 - 4*x^36 - 4*x^35 - 9*x^34 - 8*x^33 - x^32 - 3*x^31 - x^30 - 5*x^29 - 8*x^28 - 5*x^27 - 8*x^26 - 6*x^25 - 2*x^24 - 4*x^23 - 6*x^22 - 6*x^21 - 9*x^20 - x^19 - 4*x^18 - 5*x^17 - 2*x^16 - 2*x^15 - 8*x^14 - x^13 - 2*x^12 - 7*x^11 - 7*x^10 - 4*x^9 - 3*x^8 - 5*x^7 - x^6 - 8*x^5 - 8*x^3 - 9*x^2 - 3*x - 2)/(x^46 - 1). (End)

A021426 Decimal expansion of 1/422.

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane

Keywords

Links

Programs

  • Mathematica
    realDigitsRecip[422] (* The realDigitsRecip program is at A021200 *) (* Harvey P. Dale, Mar 29 2025 *)

A021431 Decimal expansion of 1/427.

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane

Keywords

Programs

  • Mathematica
    realDigitsRecip[427] (* The realDigitsRecip program is at A021200 *) (* Harvey P. Dale, Apr 03 2025 *)

A021457 Decimal expansion of 1/453.

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane

Keywords

Programs

  • Mathematica
    realDigitsRecip[453] (* The realDigitsRecip program is at A021200 *) (* Harvey P. Dale, Jun 15 2025 *)

A021460 Decimal expansion of 1/456.

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane

Keywords

Comments

Repeats the sequence 192982456140350877 after the initial 3 terms. - Wesley Ivan Hurt, Dec 04 2013

Examples

			0.0021929824561403508771929824561403508771929824561403508771929824561403...

Links

Crossrefs

Cf. A021459 (Decimal Expansion of 1/455).
Cf. A021461 (Decimal Expansion of 1/457).

Programs

  • Maple
    Digits:=100; evalf(1/456); # Wesley Ivan Hurt, Dec 04 2013
  • Mathematica
    Join[{0,0},RealDigits[1/456,10,120][[1]]] (* Harvey P. Dale, Nov 06 2012 *)
realDigitsRecip[456] (* The realDigitsRecip program is at A021200 *) (* Harvey P. Dale, Aug 28 2024 *)

A021500 Decimal expansion of 1/496.

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane

Keywords

Links

Programs

  • Mathematica
    Join[{0,0},RealDigits[1/496,10,120][[1]]] (* or *) PadRight[{0,0,2,0},120,{0,6,4,5,1,6,1,2,9,0,3,2,2,5,8}] (* Harvey P. Dale, Oct 02 2021 *)
realDigitsRecip[496] (* The realDigitsRecip program is at A021200 *) (* Harvey P. Dale, Jan 30 2025 *)

Formula

From Chai Wah Wu, Aug 10 2020: (Start)
a(n) = a(n-15) for n > 18.
G.f.: -x^2*(5*x^16 + 2*x^15 + 6*x^14 + 8*x^12 + 5*x^11 + 2*x^10 + 2*x^9 + 3*x^8 + 9*x^6 + 2*x^5 + x^4 + 6*x^3 + x^2 + 2)/(x^15 - 1). (End)

A021508 Decimal expansion of 1/504.

Original entry on oeis.org

0, 0, 1, 9, 8, 4, 1, 2, 6, 9, 8, 4, 1, 2, 6, 9, 8, 4, 1, 2, 6, 9, 8, 4, 1, 2, 6, 9, 8, 4, 1, 2, 6, 9, 8, 4, 1, 2, 6, 9, 8, 4, 1, 2, 6, 9, 8, 4, 1, 2, 6, 9, 8, 4, 1, 2, 6, 9, 8, 4, 1, 2, 6, 9, 8, 4, 1, 2, 6, 9, 8, 4, 1, 2, 6, 9, 8, 4, 1, 2, 6, 9, 8, 4, 1, 2, 6, 9, 8, 4, 1, 2, 6, 9, 8, 4, 1, 2, 6
Offset: 0

Views

Author

N. J. A. Sloane

Keywords

Links

Programs

  • Mathematica
    realDigitsRecip[504] (* The realDigitsRecip program is at A021200 *) (* Harvey P. Dale, May 16 2025 *)

Formula

From Chai Wah Wu, Aug 10 2020: (Start)
a(n) = 2*a(n-1) - 2*a(n-2) + a(n-3) for n > 5.
G.f.: x^2*(-5*x^3 + 8*x^2 - 7*x - 1)/((x - 1)*(x^2 - x + 1)). (End)

A021527 Decimal expansion of 1/523.

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane

Keywords

Programs

  • Mathematica
    Join[{0,0},RealDigits[1/523,10,120][[1]]] (* Harvey P. Dale, Jun 13 2022 *)
realDigitsRecip[523] (* The realDigitsRecip program is at A021200 *) (* Harvey P. Dale, Dec 01 2024 *)
Previous Showing 31-40 of 74 results. Next

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

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