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.

A188354 Number of arrangements of n+1 numbers x(i) in -5..5 with the sum of x(i)*x(i+1) equal to zero.

Table of values

n a(n)
1 21
2 231
3 749
4 8051
5 45801
6 480363
7 3882729
8 40629247
9 383541193
10 4033546763
11 40584302909
12 428984471067
13 4442125791917
14 47152504083651
15 495572482473621
16 5279048333736159
17 55969066137457201
18 598015958507349743

List of values

[21, 231, 749, 8051, 45801, 480363, 3882729, 40629247, 383541193, 4033546763, 40584302909, 428984471067, 4442125791917, 47152504083651, 495572482473621, 5279048333736159, 55969066137457201, 598015958507349743]

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

Content is available under The OEIS End-User License Agreement.