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.

A267630 Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any west neighbor modulo 4 and the upper left element equal to 0.

Table of values

n a(n)
1 6
2 27
3 208
4 2386
5 32208
6 445970
7 6039160
8 80742586
9 1086798652
10 14898269746
11 208430268352
12 2964609577834
13 42639468240764
14 617605254789776
15 8990677585470960
16 131473208822453124
17 1931423573382740480

List of values

[6, 27, 208, 2386, 32208, 445970, 6039160, 80742586, 1086798652, 14898269746, 208430268352, 2964609577834, 42639468240764, 617605254789776, 8990677585470960, 131473208822453124, 1931423573382740480]

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

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