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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.

A356490 a(n) is the determinant of a symmetric Toeplitz matrix M(n) whose first row consists of prime(1), prime(2), ..., prime(n).

Table of values

n a(n)
0 1
1 2
2 -5
3 12
4 -19
5 -22
6 1143
7 -4284
8 14265
9 -46726
10 -84405
11 1306096
12 32312445
13 522174906
14 4105967871
15 5135940112
16 -642055973735
17 -2832632334858
18 14310549077571
19 380891148658140
20 4888186898996125
21 -49513565563840210
22 383405170118692791
23 -2517836083641473036
24 -3043377347606882055

List of values

[1, 2, -5, 12, -19, -22, 1143, -4284, 14265, -46726, -84405, 1306096, 32312445, 522174906, 4105967871, 5135940112, -642055973735, -2832632334858, 14310549077571, 380891148658140, 4888186898996125, -49513565563840210, 383405170118692791, -2517836083641473036, -3043377347606882055]