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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.

A275798 One half of the number of n X n square grids with squares of two colors modulo operations of the dihedral group D_4.

Table of values

n a(n)
1 1
2 3
3 51
4 4274
5 2105872
6 4295278656
7 35184441295872
8 1152921514002096128
9 151115727460762179076096
10 79228162514269052299408048128
11 166153499473114502703835144588886016
12 1393796574908163946384646767619026404245504
13 46768052394588893382518536034792338549485151977472

List of values

[1, 3, 51, 4274, 2105872, 4295278656, 35184441295872, 1152921514002096128, 151115727460762179076096, 79228162514269052299408048128, 166153499473114502703835144588886016, 1393796574908163946384646767619026404245504, 46768052394588893382518536034792338549485151977472]

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

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