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 21-23 of 23 results.

A172331 a(n) = floor(n*(sqrt(13)+sqrt(7))).

Original entry on oeis.org

0, 6, 12, 18, 25, 31, 37, 43, 50, 56, 62, 68, 75, 81, 87, 93, 100, 106, 112, 118, 125, 131, 137, 143, 150, 156, 162, 168, 175, 181, 187, 193, 200, 206, 212, 218, 225, 231, 237, 243, 250, 256, 262, 268, 275, 281, 287, 293, 300, 306, 312
Offset: 0

Views

Author

Vincenzo Librandi, Feb 01 2010

Keywords

Comments

Also integer part of n*6.2513025865..., where the constant is the largest root of x^4 -40*x^2 +36.

Links

Crossrefs

Cf. A110117, A172323-A172332, A172334, A172336-A172338.

Programs

  • Magma
    [Floor(n*(Sqrt(13)+Sqrt(7))): n in [0..60]];
  • Mathematica
    With[{c = Sqrt[13] + Sqrt[7]}, Floor[c Range[0, 70]]] (* Vincenzo Librandi, Aug 01 2013 *)

A228176 Floor(n*(sqrt(10)+sqrt(3))).

Original entry on oeis.org

0, 4, 9, 14, 19, 24, 29, 34, 39, 44, 48, 53, 58, 63, 68, 73, 78, 83, 88, 92, 97, 102, 107, 112, 117, 122, 127, 132, 137, 141, 146, 151, 156, 161, 166, 171, 176, 181, 185, 190, 195, 200, 205, 210, 215, 220, 225, 230, 234, 239, 244, 249, 254, 259, 264, 269, 274
Offset: 0

Views

Author

Vincenzo Librandi, Aug 15 2013

Keywords

Comments

a(n) = integer part of n*4.894328468..., where the constant is the largest root of x^4 -26*x^2 +49.

Links

Crossrefs

Cf. A110117, A172323 * A172332, A172334, A172336 * A172338.

Programs

  • Magma
    [Floor(n*(Sqrt(10)+Sqrt(3))): n in [0..60]];
  • Mathematica
    With[{c = Sqrt[10] + Sqrt[3]}, Floor[c Range[0, 60]]]

A228177 Floor(n*(sqrt(6)+sqrt(5))).

Original entry on oeis.org

0, 4, 9, 14, 18, 23, 28, 32, 37, 42, 46, 51, 56, 60, 65, 70, 74, 79, 84, 89, 93, 98, 103, 107, 112, 117, 121, 126, 131, 135, 140, 145, 149, 154, 159, 163, 168, 173, 178, 182, 187, 192, 196, 201, 206, 210, 215, 220, 224, 229, 234, 238, 243, 248, 253, 257, 262
Offset: 0

Views

Author

Vincenzo Librandi, Aug 15 2013

Keywords

Comments

a(n) = integer part of n*4.6855577..., where the constant is the largest root of x^4 -22*x^2 +1.

Links

Crossrefs

Cf. A110117, A172323 - A172332, A172334, A172336 - A172338.

Programs

  • Magma
    [Floor(n*(Sqrt(6)+Sqrt(5))): n in [0..60]];
  • Mathematica
    With[{c = Sqrt[6] + Sqrt[5]}, Floor[c Range[0, 60]]]
Previous Showing 21-23 of 23 results.

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

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