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.

A266310 Number of 3Xn arrays containing n copies of 0..3-1 with no element 1 greater than its west neighbor modulo 3 and the upper left element equal to 0.

Table of values

n a(n)
1 2
2 7
3 39
4 265
5 1802
6 12239
7 84614
8 597601
9 4289844
10 31138558
11 227912351
12 1679866698
13 12457873439
14 92883320659
15 695746287346
16 5232714491851
17 39496475643074
18 299071199295812
19 2271081847307045
20 17290623003826450

List of values

[2, 7, 39, 265, 1802, 12239, 84614, 597601, 4289844, 31138558, 227912351, 1679866698, 12457873439, 92883320659, 695746287346, 5232714491851, 39496475643074, 299071199295812, 2271081847307045, 17290623003826450]

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

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