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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.

A200549 Number of -4..4 arrays x(0..n+1) of n+2 elements with zero sum and nonzero second differences.

Table of values

n a(n)
1 52
2 446
3 3396
4 26850
5 211374
6 1689732
7 13587804
8 109957140
9 893510530
10 7288331916
11 59637096784
12 489325754576
13 4024444316206
14 33167657580268
15 273853057747366
16 2264784856966600
17 18757225819498566
18 155553439876468586

List of values

[52, 446, 3396, 26850, 211374, 1689732, 13587804, 109957140, 893510530, 7288331916, 59637096784, 489325754576, 4024444316206, 33167657580268, 273853057747366, 2264784856966600, 18757225819498566, 155553439876468586]

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

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