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.

A249978 Number of length n+1 0..2 X 4 arrays with the sum of the absolute values of adjacent differences equal to n*4.

Table of values

n a(n)
1 10
2 64
3 426
4 3030
5 22560
6 168506
7 1293326
8 9937894
9 77372824
10 604180880
11 4749038012
12 37448196486
13 296429721556
14 2352824897458
15 18723425845436
16 149319341015310
17 1193131013642304
18 9549922015472032
19 76554889282313192

List of values

[10, 64, 426, 3030, 22560, 168506, 1293326, 9937894, 77372824, 604180880, 4749038012, 37448196486, 296429721556, 2352824897458, 18723425845436, 149319341015310, 1193131013642304, 9549922015472032, 76554889282313192]

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

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