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.

A275799 Number of inequivalent (modulo C_4 rotations) square n X n grids with squares coming in two colors and three squares have one of the colors.

Table of values

n a(n)
2 1
3 22
4 140
5 578
6 1785
7 4612
8 10416
9 21340
10 40425
11 72010
12 121836
13 197582
14 308945
15 468328
16 690880
17 995352
18 1404081
19 1944030
20 2646700
21 3549370
22 4694921
23 6133292
24 7921200
25 10123828
26 12814425
27 16076242
28 20001996
29 24696070
30 30273825
31 36864080

List of values

[1, 22, 140, 578, 1785, 4612, 10416, 21340, 40425, 72010, 121836, 197582, 308945, 468328, 690880, 995352, 1404081, 1944030, 2646700, 3549370, 4694921, 6133292, 7921200, 10123828, 12814425, 16076242, 20001996, 24696070, 30273825, 36864080]

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

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