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 1-3 of 3 results.

A341877 The number of regions inside a vesica piscis formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.

Original entry on oeis.org

1, 4, 24, 84, 236, 508, 1048, 1820, 3110, 4644, 7428, 10520, 15108, 20288, 27576, 35632, 46652, 58548, 74156, 89992, 112288, 135064, 163684, 193572, 230884, 269612, 316846, 365496, 425060, 485392, 558744, 632888, 721636, 811724, 918040, 1025224, 1151904, 1279188, 1427720, 1575496
Offset: 1

Views

Author

Scott R. Shannon and N. J. A. Sloane, Feb 22 2021

Keywords

Comments

The terms are from numeric computation - no formula for a(n) is currently known.

Links

Crossrefs

Cf. A341878 (vertices), A342152 (edges), A342153 (n-gons), A007678, A092867, A340639, A340685.

A341878 The number of vertices on a vesica piscis formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.

Original entry on oeis.org

2, 5, 19, 65, 203, 429, 963, 1643, 2929, 4173, 7179, 9985, 14747, 19503, 27043, 34511, 46011, 57171, 73339, 87509, 111219, 132809, 162459, 190703, 229419, 266285, 315041, 361179, 423067, 480201, 556451, 627039, 718923, 805217, 915091, 1017379, 1148595, 1270569, 1423907, 1564359
Offset: 1

Views

Author

Scott R. Shannon and N. J. A. Sloane, Feb 22 2021

Keywords

Comments

The terms are from numeric computation - no formula for a(n) is currently known.

Links

Crossrefs

Cf. A341877 (regions), A342152 (edges), A342153 (n-gons), A007569, A092866, A340644, A340686.

A342152 The number of edges on a vesica piscis formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.

Original entry on oeis.org

2, 8, 42, 148, 438, 936, 2010, 3462, 6038, 8816, 14606, 20504, 29854, 39790, 54618, 70142, 92662, 115718, 147494, 177500, 223506, 267872, 326142, 384274, 460302, 535896, 631886, 726674, 848126, 965592, 1115194, 1259926, 1440558, 1616940, 1833130, 2042602, 2300498, 2549756, 2851626, 3139854
Offset: 1

Views

Author

Scott R. Shannon and N. J. A. Sloane, Mar 02 2021

Keywords

Comments

The terms are from numeric computation - no formula for a(n) is currently known.
See A341877 for images of the regions and A341878 for images of the vertices.

Links

Crossrefs

Cf. A341877 (regions), A341878 (vertices), A342153 (n-gons), A135565, A332376, A340613, A340687.

Formula

a(n) = A341877(n) + A341878(n) - 1.
Showing 1-3 of 3 results.

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

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