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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.

A305626 Number of chiral pairs of rows of n colors with exactly 6 different colors.

Table of values

n a(n)
1 0
2 0
3 0
4 0
5 0
6 360
7 7560
8 95760
9 952560
10 8217720
11 64614960
12 476514360
13 3355664760
14 22837086720
15 151449482520
16 984573465120
17 6302069010720
18 39847409421480
19 249509368422720
20 1550188394120520
21 9570844541994120
22 58789922099665680
23 359629148397511080
24 2192484972513916080
25 13329510116645202480
26 80854267307329446840
27 489528474458978944080
28 2959252601445086408280
29 17866194139995100525080
30 107751636988750077294240
31 649286502010403671101240

List of values

[0, 0, 0, 0, 0, 360, 7560, 95760, 952560, 8217720, 64614960, 476514360, 3355664760, 22837086720, 151449482520, 984573465120, 6302069010720, 39847409421480, 249509368422720, 1550188394120520, 9570844541994120, 58789922099665680, 359629148397511080, 2192484972513916080, 13329510116645202480, 80854267307329446840, 489528474458978944080, 2959252601445086408280, 17866194139995100525080, 107751636988750077294240, 649286502010403671101240]

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