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.

A196488 Number of n X 3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,3,0,1,4 for x=0,1,2,3,4.

Table of values

n a(n)
1 1
2 3
3 9
4 23
5 69
6 199
7 553
8 1563
9 4439
10 12591
11 35645
12 100885
13 285753
14 809481
15 2292615
16 6492777
17 18388691
18 52081399
19 147506079
20 417765845
21 1183196095
22 3351057703
23 9490892585
24 26880156625
25 76130113051
26 215616141961
27 610669320471

List of values

[1, 3, 9, 23, 69, 199, 553, 1563, 4439, 12591, 35645, 100885, 285753, 809481, 2292615, 6492777, 18388691, 52081399, 147506079, 417765845, 1183196095, 3351057703, 9490892585, 26880156625, 76130113051, 215616141961, 610669320471]

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

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