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.

A200449 Number of -3..3 arrays x(0..n+1) of n+2 elements with zero sum and nonzero first and second differences.

Table of values

n a(n)
1 26
2 142
3 728
4 3788
5 19802
6 103726
7 548204
8 2916664
9 15576706
10 83481240
11 448758338
12 2418733790
13 13066215896
14 70726653732
15 383520053994
16 2082953525918
17 11328873637896
18 61694898371006
19 336368349457684
20 1835858710497508

List of values

[26, 142, 728, 3788, 19802, 103726, 548204, 2916664, 15576706, 83481240, 448758338, 2418733790, 13066215896, 70726653732, 383520053994, 2082953525918, 11328873637896, 61694898371006, 336368349457684, 1835858710497508]

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

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