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.

A268007 Number of nX3 0..3 arrays with every repeated value in every row and column unequal to the previous repeated value, and new values introduced in row-major sequential order.

Table of values

n a(n)
1 4
2 159
3 7445
4 381958
5 18691624
6 911680225
7 43653230106
8 2074179818184
9 97646068246936
10 4569116947346091
11 212625847203245237
12 9853280365275338623
13 455001756707087106187
14 20951793886914002899807
15 962541121729004548522176

List of values

[4, 159, 7445, 381958, 18691624, 911680225, 43653230106, 2074179818184, 97646068246936, 4569116947346091, 212625847203245237, 9853280365275338623, 455001756707087106187, 20951793886914002899807, 962541121729004548522176]

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

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