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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.

A356483 a(n) is the hafnian of a symmetric Toeplitz matrix M(2*n) whose first row consists of prime(1), prime(2), ..., prime(2*n).

Table of values

n a(n)
0 1
1 3
2 55
3 2999
4 347391
5 69702479
6 22441691645
7 10776262328919
8 7190279422736061
9 6439969796874334809
10 7447188585071730451961

List of values

[1, 3, 55, 2999, 347391, 69702479, 22441691645, 10776262328919, 7190279422736061, 6439969796874334809, 7447188585071730451961]

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

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