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.

A331366 Number of Heronian triangles with mutually distinct side lengths and perimeter A334665(n).

Original entry on oeis.org

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

Views

Author

Wesley Ivan Hurt, May 07 2020

Keywords

Examples

			a(1) = 1; there is one Heronian triangle with perimeter A334665(1) = 12 such that all side lengths are mutually distinct, [3,4,5].
a(4) = 1; there is one Heronian triangle with perimeter A334665(4) = 32 such that all side lengths are mutually distinct, [4,13,15].

Links

Crossrefs

Cf. A051516, A051518, A334665.

A331367 Perimeters of primitive Heronian triangles with mutually distinct side lengths.

Original entry on oeis.org

12, 30, 32, 36, 40, 42, 44, 48, 54, 56, 60, 64, 66, 68, 70, 72, 76, 78, 80, 84, 90, 96, 98, 100, 104, 108, 110, 112, 114, 120, 126, 128, 130, 132, 136, 140, 144, 150, 152, 154, 156, 160, 162, 164, 168, 170, 172, 174, 176, 180, 182, 186, 190, 192, 196, 198, 200, 204, 208
Offset: 1

Views

Author

Wesley Ivan Hurt, May 07 2020

Keywords

Examples

			a(1) = 12; there is one primitive Heronian triangle with perimeter 12 such that all side lengths are mutually distinct, [3,4,5].
a(2) = 30; there is one primitive Heronian triangle with perimeter 30 such that all side lengths are mutually distinct, [5,12,13].

Links

Crossrefs

Cf. A331366, A334665.

A334674 Perimeters of nonprimitive Heronian triangles with mutually distinct side lengths.

Original entry on oeis.org

24, 36, 48, 60, 64, 72, 80, 84, 88, 90, 96, 108, 112, 120, 126, 128, 132, 136, 140, 144, 150, 152, 156, 160, 162, 168, 176, 180, 192, 196, 198, 200, 204, 208, 210, 216, 220, 224, 228, 234, 240, 252, 256, 260, 264, 270, 272, 276, 280, 288, 294, 300, 304, 308, 312, 320
Offset: 1

Views

Author

Wesley Ivan Hurt, May 07 2020

Keywords

Examples

			a(1) = 24; there is one nonprimitive Heronian triangle with perimeter 24 whose side lengths are mutually distinct, [6,8,10].
a(2) = 36; there is one nonprimitive Heronian triangle with perimeter 36 whose side lengths are mutually distinct, [9,12,15].

Links

Crossrefs

Cf. A331366, A334665.

A334675 Number of nonprimitive Heronian triangles with mutually distinct side lengths and perimeter A334674(n).

Original entry on oeis.org

1, 1, 1, 2, 1, 2, 1, 3, 1, 1, 3, 5, 1, 4, 2, 2, 3, 1, 2, 4, 1, 1, 2, 4, 3, 9, 1, 7, 5, 3, 1, 2, 2, 2, 5, 11, 2, 6, 3, 1, 8, 10, 6, 1, 9, 7, 2, 1, 7, 8, 5, 9, 2, 4, 7, 7, 15, 1, 3, 15, 2, 1, 1, 2, 2, 7, 11, 3, 3, 6, 3, 16, 3, 9, 13, 8, 6, 5, 21, 17, 6, 2, 12, 9, 8, 3, 6, 1, 11, 1
Offset: 1

Views

Author

Wesley Ivan Hurt, May 07 2020

Keywords

Examples

			a(1) = 1; there is one nonprimitive Heronian triangle with perimeter A334674(1) = 24 whose side lengths are mutually distinct, [6,8,10].
a(2) = 1; there is one nonprimitive Heronian triangle with perimeter A334674(2) = 36 whose side lengths are mutually distinct, [9,12,15].

Links

Crossrefs

Cf. A331366, A334665, A334674.
Showing 1-4 of 4 results.

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