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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.

A356493 a(n) is the permanent of a symmetric Toeplitz matrix M(n) whose first row consists of prime(n), prime(n-1), ..., prime(1).

Table of values

n a(n)
0 1
1 2
2 13
3 271
4 12030
5 1346758
6 214022024
7 51763672608
8 16088934953136
9 6611717516842608
10 4412314619046451200
11 3533754988232088933120
12 3506189715435673999194112
13 4444138735439968822425464576
14 5893766827264238066914528545792
15 8502284313901016361834901076874240
16 15350799440394462109333953415858960384

List of values

[1, 2, 13, 271, 12030, 1346758, 214022024, 51763672608, 16088934953136, 6611717516842608, 4412314619046451200, 3533754988232088933120, 3506189715435673999194112, 4444138735439968822425464576, 5893766827264238066914528545792, 8502284313901016361834901076874240, 15350799440394462109333953415858960384]

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

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