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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.

A160492 a(n) = number of solutions to an equation x_1 + ... + x_j =0 with 1<=j<=n satisfying -n<=x_i<=n (1<=i<=j).

Table of values

n a(n)
1 1
2 6
3 45
4 560
5 9795
6 223524
7 6284089
8 210208560
9 8156750283
10 360297117070
11 17853149451841
12 980844453593160
13 59179098916735213
14 3890176308574524934
15 276750779199166606705
16 21185250061147839785120
17 1736385140876356212244563
18 151719500906542020597450498

List of values

[1, 6, 45, 560, 9795, 223524, 6284089, 210208560, 8156750283, 360297117070, 17853149451841, 980844453593160, 59179098916735213, 3890176308574524934, 276750779199166606705, 21185250061147839785120, 1736385140876356212244563, 151719500906542020597450498]

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

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