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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.

A165344 Second series of Hankel determinants based on A001044(n+1)=((n+1)!)^2 : a(n)=det(A001044(i+j-1))=det(((i+j-1)!)^2), i,j=1,2...n. Hankel transform of A001044(n+1).

Table of values

n a(n)
0 1
1 20
2 75456
3 222049714176
4 1446859308630697574400
5 47680530046593302430474043392000000
6 15747911603441625571224989926437024694272000000000000

List of values

[1, 20, 75456, 222049714176, 1446859308630697574400, 47680530046593302430474043392000000, 15747911603441625571224989926437024694272000000000000]

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

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