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.

A188353 Number of arrangements of n+1 numbers x(i) in -4..4 with the sum of x(i)*x(i+1) equal to zero.

Table of values

n a(n)
1 17
2 153
3 497
4 4201
5 22229
6 181449
7 1264985
8 10396729
9 81850801
10 684867741
11 5680170701
12 48268778269
13 410276328441
14 3525682027185
15 30364372592101
16 262996695840081
17 2283098828435689
18 19886474577091625
19 173553193860930897

List of values

[17, 153, 497, 4201, 22229, 181449, 1264985, 10396729, 81850801, 684867741, 5680170701, 48268778269, 410276328441, 3525682027185, 30364372592101, 262996695840081, 2283098828435689, 19886474577091625, 173553193860930897]

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

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