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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.

A101800 a(n)= abs(det[A000166(i+j+1)]), i,j=0...n, is the absolute value of the Hankel determinant of order n+1 of the derangements numbers, cf. A000166.

Table of values

n a(n)
0 0
1 1
2 16
3 2160
4 4644864
5 220962816000
6 126311423016960000
7 97655159393202733056000000
8 2873961139404949958783139840000000000
9 5118723340142578530942677236206891171840000000000

List of values

[0, 1, 16, 2160, 4644864, 220962816000, 126311423016960000, 97655159393202733056000000, 2873961139404949958783139840000000000, 5118723340142578530942677236206891171840000000000]

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

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