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.

A193283 Triangle T(n,k), n>=1, 0<=k<=n*(n+1)/2, read by rows: row n gives the coefficients of the chromatic polynomial of the n X n X n triangular grid, highest powers first.

Table of values

n a(n)
1 1
2 0
3 1
4 -3
5 2
6 0
7 1
8 -9
9 32
10 -56
11 48
12 -16
13 0
14 1
15 -18
16 144
17 -672
18 2016
19 -4031
20 5368
21 -4584
22 2272
23 -496
24 0
25 1
26 -30
27 419
28 -3612
29 21477
30 -93207
31 304555
32 -761340
33 1463473
34 -2152758
35 2385118
36 -1929184
37 1075936
38 -369824
39 58976
40 0

List of values

[1, 0, 1, -3, 2, 0, 1, -9, 32, -56, 48, -16, 0, 1, -18, 144, -672, 2016, -4031, 5368, -4584, 2272, -496, 0, 1, -30, 419, -3612, 21477, -93207, 304555, -761340, 1463473, -2152758, 2385118, -1929184, 1075936, -369824, 58976, 0]