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.

A266574 Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its northwest or southwest neighbor modulo 4 and the upper left element equal to 0.

Table of values

n a(n)
1 6
2 74
3 2320
4 77830
5 2595190
6 94930586
7 3708826784
8 148879349035
9 6098536482216
10 255081230000786
11 10848711502940592
12 467125765450160196
13 20321101379722519804
14 892020118445773622883
15 39459836156094190716464

List of values

[6, 74, 2320, 77830, 2595190, 94930586, 3708826784, 148879349035, 6098536482216, 255081230000786, 10848711502940592, 467125765450160196, 20321101379722519804, 892020118445773622883, 39459836156094190716464]

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

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