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.

A206691 Number of nX7 0..3 arrays with no element equal to another within two positions in the same row or column, and new values 0..3 introduced in row major order.

Table of values

n a(n)
1 16
2 1216
3 11264
4 127008
5 1454810
6 17277556
7 208563912
8 2543024548
9 31198656992
10 384076975680
11 4737250216482
12 58497114248288
13 722787914355820
14 8933909144447138
15 110448738176212632
16 1365616810440861728

List of values

[16, 1216, 11264, 127008, 1454810, 17277556, 208563912, 2543024548, 31198656992, 384076975680, 4737250216482, 58497114248288, 722787914355820, 8933909144447138, 110448738176212632, 1365616810440861728]

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

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