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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.

A350513 Number of 2 X n rectangular Celtic knots (up to rotations and symmetries).

Table of values

n a(n)
1 3
2 21
3 648
4 15552
5 404595
6 10812528
7 290993472
8 7849029276
9 211855234563
10 5719493462076
11 154420985682648
12 4169319089851512
13 112571188876032435
14 3039418274650387848
15 82064259021919140432
16 2215734684425617523796
17 59824833697843168341123
18 1615270484817096465311316

List of values

[3, 21, 648, 15552, 404595, 10812528, 290993472, 7849029276, 211855234563, 5719493462076, 154420985682648, 4169319089851512, 112571188876032435, 3039418274650387848, 82064259021919140432, 2215734684425617523796, 59824833697843168341123, 1615270484817096465311316]

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

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