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.

Showing 1-4 of 4 results.

A326758 a(n) is the Y-coordinate of the n-th nonattacking queen placed by greedy algorithm on N^3 (as described in A326757).

Original entry on oeis.org

0, 1, 0, 2, 0, 4, 1, 2, 0, 4, 1, 0, 5, 3, 3, 0, 5, 7, 6, 3, 2, 1, 0, 6, 5, 1, 8, 7, 5, 4, 1, 3, 2, 3, 1, 6, 9, 9, 8, 10, 5, 2, 6, 3, 1, 12, 4, 2, 1, 3, 8, 7, 5, 8, 4, 6, 15, 3, 3, 1, 2, 7, 12, 13, 6, 0, 2, 12, 11, 4, 13, 1, 2, 0, 8, 4, 10, 15, 9, 13, 5, 4, 3
Offset: 0

Views

Author

Rémy Sigrist and N. J. A. Sloane, Jul 23 2019

Keywords

Links

Crossrefs

See A326757 for the X-coordinates and additional comments.

Programs

  • PARI
    See Links section.

A326759 a(n) is the Z-coordinate of the n-th nonattacking queen placed by greedy algorithm on N^3 (as described in A326757).

Original entry on oeis.org

0, 2, 1, 0, 4, 1, 0, 4, 2, 0, 6, 5, 3, 0, 6, 3, 2, 1, 0, 3, 1, 7, 6, 5, 0, 9, 3, 2, 7, 6, 5, 4, 2, 10, 8, 2, 1, 5, 4, 3, 1, 12, 9, 5, 4, 1, 12, 11, 3, 2, 1, 11, 9, 8, 7, 3, 2, 1, 14, 12, 9, 8, 7, 3, 1, 12, 8, 6, 5, 4, 2, 1, 16, 14, 13, 8, 7, 4, 2, 0, 14, 13
Offset: 0

Views

Author

Rémy Sigrist and N. J. A. Sloane, Jul 23 2019

Keywords

Links

Crossrefs

See A326757 for the X-coordinates and additional comments.

Programs

  • PARI
    See Links section.

A326764 Lexicographically earliest array T(x,y,z) of nonnegative integers with x, y, z >= 0, such that the terms alongside any line parallel to any of the 13 axes of rotation of a cube are distinct.

Original entry on oeis.org

0, 1, 2, 3, 2, 4, 5, 1, 6, 4, 3, 0, 6, 5, 7, 0, 4, 0, 1, 2, 4, 1, 7, 3, 8, 9, 2, 9, 10, 3, 5, 10, 8, 7, 1, 5, 6, 0, 2, 5, 10, 7, 11, 12, 1, 0, 6, 4, 11, 8, 3, 1, 5, 9, 0, 6, 6, 3, 1, 0, 9, 8, 5, 4, 13, 11, 4, 12, 14, 2, 0, 7, 8, 3, 6, 5, 2, 8, 2, 0, 1, 3, 4, 5
Offset: 0

Views

Author

Rémy Sigrist and N. J. A. Sloane, Jul 24 2019

Keywords

Comments

The triangle is read by increasing x+y+z and then increasing x+y and then increasing x.
The sequences A326757, A326758 and A326759 give the X-, Y- and Z-coordinates, respectively, of the 0's in array T.

Examples

			Array T(x,y,z) begins:
- z=3:
      0| 3
    ---+--
    x/y| 0
- z=2:
      1| 0
      0| 2 6
    ---+----
    x/y| 0 1
- z=1:
      2| 5
      1| 4 7
      0| 1 5 0
    ---+------
    x/y| 0 1 2
- z=0:
      3| 4
      2| 1 0
      1| 2 6 1
      0| 0 3 4 2
    ---+--------
    x/y| 0 1 2 3

Links

Crossrefs

Cf. A326757, A326758, A326759.
Cf. A326765, A326766, A326767, A326768, A326769, A326770.

Programs

  • PARI
    See Links section.

Formula

T(A326757(n), A326758(n), A326759(n)) = 0.
T(x, 0, 0) = A326765(x).
T(0, y, 0) = A326766(y).
T(0, 0, z) = z.
T(x, x, x) = A326767(x).
T(0, y, y) = A326768(y).
T(x, 0, x) = A326769(x).
T(x, x, 0) = A326770(x).

A309362 Positions of 0's in A326764 (interpreted as a flat sequence).

Original entry on oeis.org

0, 11, 15, 17, 37, 45, 54, 59, 70, 79, 124, 129, 135, 161, 171, 192, 195, 202, 213, 252, 272, 299, 306, 307, 358, 372, 410, 422, 477, 486, 498, 506, 530, 571, 586, 644, 655, 736, 749, 760, 794, 828, 845, 890, 905, 939, 985, 994, 1087, 1101, 1113, 1168, 1189
Offset: 0

Views

Author

Rémy Sigrist, Jul 25 2019

Keywords

Links

Crossrefs

Cf. A056558, A056559, A056560, A326757, A326758, A326759, A326764.

Programs

  • PARI
    See Links section.

Formula

A326757(n) = A056558(a(n)).
A326758(n) = A056560(a(n)).
A326759(n) = A056559(a(n)).
Showing 1-4 of 4 results.

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

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