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.

A346421 Triangular array read by rows. T(n,k) is the number of n X n matrices over GF(3) such that the sum of the dimensions of its eigenspaces taken over all its eigenvalues is k, 0 <= k <= n, n >= 0.

Table of values

n a(n)
0 1
1 0
2 3
3 18
4 24
5 39
6 3456
7 8190
8 5928
9 2109
10 7619508
11 17094240
12 13700700
13 4215120
14 417153
15 149200289280
16 335730157884
17 267485755680
18 85615372260
19 8910314160
20 346720179
21 26394940582090344
22 59388527912287392
23 47325384827973252
24 15262273318168800
25 1648005959253654
26 74268805562952
27 1233891662727

List of values

[1, 0, 3, 18, 24, 39, 3456, 8190, 5928, 2109, 7619508, 17094240, 13700700, 4215120, 417153, 149200289280, 335730157884, 267485755680, 85615372260, 8910314160, 346720179, 26394940582090344, 59388527912287392, 47325384827973252, 15262273318168800, 1648005959253654, 74268805562952, 1233891662727]