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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.

A209461 Number of nX4 0..6 arrays with every 2X2 subblock containing exactly one value repeat, and new values 0..6 introduced in row major order.

Table of values

n a(n)
1 15
2 700
3 107472
4 26142922
5 8012278798
6 2694404849980
7 937020001725427
8 329698685591776814
9 116478477506382991586
10 41208120649861041328594
11 14585813504694387764542258
12 5163586671381153188498288526

List of values

[15, 700, 107472, 26142922, 8012278798, 2694404849980, 937020001725427, 329698685591776814, 116478477506382991586, 41208120649861041328594, 14585813504694387764542258, 5163586671381153188498288526]

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

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