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 11-15 of 15 results.

A291161 Sequence of black numbers on the double zero (American) roulette wheel read clockwise.

Original entry on oeis.org

28, 26, 11, 20, 17, 22, 15, 24, 13, 10, 29, 8, 31, 6, 33, 4, 35, 2, 28, 26, 11, 20, 17, 22, 15, 24, 13, 10, 29, 8, 31, 6, 33, 4, 35, 2
Offset: 1

Views

Author

Hugo Pfoertner, Aug 19 2017

Keywords

Comments

The angular spacing on the rotor between the black numbers 13 and 10 is 4*Pi/19 due to the insertion of red 1, double zero and red 27. The spacing of all other black neighbors is 2*Pi/19 due to one inserted red number or the single zero between the black numbers 2 and 28.

Links

Crossrefs

Cf. A069892, A069893, A291151, A291152, A291154, A291155, A291156, A291157, A291158, A291159, A291160, A291162, A291171.

A291162 Sequence of black numbers on the double zero (American) roulette wheel read counterclockwise.

Original entry on oeis.org

2, 35, 4, 33, 6, 31, 8, 29, 10, 13, 24, 15, 22, 17, 20, 11, 26, 28, 2, 35, 4, 33, 6, 31, 8, 29, 10, 13, 24, 15, 22, 17, 20, 11, 26, 28
Offset: 1

Views

Author

Hugo Pfoertner, Aug 19 2017

Keywords

Comments

The angular spacing on the rotor between the black numbers 10 and 13 is 4*Pi/19 due to the insertion of red 27, double zero and red 1. The spacing of all other black neighbors is 2*Pi/19 due to one inserted red number or the single zero between the black numbers 28 and 2.

Links

Crossrefs

Cf. A069892, A069893, A291151, A291152, A291154, A291155, A291156, A291157, A291158, A291159, A291160, A291161, A291171.

A291171 Black numbers on the roulette wheel.

Original entry on oeis.org

2, 4, 6, 8, 10, 11, 13, 15, 17, 20, 22, 24, 26, 28, 29, 31, 33, 35
Offset: 1

Views

Author

Hugo Pfoertner, Aug 19 2017

Keywords

Comments

The black numbers are identical on single zero (European) and double zero (American) roulette wheels, but their arrangement is different. For order of numbers on wheel see sequences provided in crossrefs.

Links

Crossrefs

Cf. A069892, A069893, A291151, A291152, A291154, A291155, A291156, A291157, A291158, A291159, A291160, A291161, A291162.

A385491 Period 8: repeat [1, 8, 4, 3, 6, 5, 7, 2].

Original entry on oeis.org

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

Views

Author

Christopher W Moriarty, Jun 30 2025

Keywords

Comments

The Chevrolet V8 engine cylinder firing order used in nearly all GMC small block (265-400 cubic inch) and big block (396-454 cubic inch) engines dating back to the 1950's.

References

  • John Baechtel, Chevy Small-Block V-8 Interchange Manual: 2nd Edition. CarTech Inc., 2010. ISBN: 1934709405.
  • Bill Jenkins, The Chevrolet Racing Engine. HP Books, 1976.

Links

Crossrefs

Cf. A003833, A069892, A385634.

Programs

  • Mathematica
    PadRight[{}, 100, {1, 8, 4, 3, 6, 5, 7, 2}] (* Paolo Xausa, Jul 12 2025 *)

Formula

G.f.: -(2*x^6+5*x^5+6*x^3-3*x^2+7*x+1)/((x-1)*(x^2+1)*(x^4+1)). - Alois P. Heinz, Jun 30 2025

A292151 Orphelins (orphans): Numbers in two disjoint sectors of the Roulette wheel addressed by an announced bet in European (French) Roulette.

Original entry on oeis.org

1, 6, 9, 14, 17, 20, 31, 34
Offset: 1

Views

Author

Hugo Pfoertner, Sep 09 2017

Keywords

Comments

The orphelins are the union of 5 numbers (1 - red, 20 - black, 14 - red, 31 - black, 9 -red) in a first sector and of 3 numbers (17 - black, 34 - red, 6 - black) in another sector. The two disjoint sectors separate the "Voisins du Zéro" (neighbors of zero) sector from the "Tiers du Cyclindre" (one third of the wheel) sector.

Links

Crossrefs

Cf. A069892, A069893, A291151, A291152, A291154, A291155, A291156, A291157, A291158, A291159, A291160, A291161, A291162, A291171.
Previous Showing 11-15 of 15 results.

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