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.

A136331 The discriminant of the characteristic polynomial of the O+ and O- submatrix for spin 3 of the nuclear electric quadrupole Hamiltonian is a perfect square for these values.

Table of values

n a(n)
0 0
1 3
2 6
3 21
4 48
5 195
6 462
7 1917
8 4560
9 18963
10 45126
11 187701
12 446688
13 1858035
14 4421742
15 18392637
16 43770720
17 182068323
18 433285446
19 1802290581
20 4289083728
21 17840837475
22 42457551822
23 176606084157
24 420286434480
25 1748220004083

List of values

[0, 3, 6, 21, 48, 195, 462, 1917, 4560, 18963, 45126, 187701, 446688, 1858035, 4421742, 18392637, 43770720, 182068323, 433285446, 1802290581, 4289083728, 17840837475, 42457551822, 176606084157, 420286434480, 1748220004083]