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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.

A177147 a(n) = determinant of n X n circulant matrix whose first row consists of the first n positive triangular numbers.

Table of values

n a(n)
1 1
2 -8
3 190
4 -8880
5 683375
6 -78206688
7 12452171844
8 -2631354777600
9 712425472573815
10 -240455417915625000
11 98981390235327670642
12 -48810267466347374088192
13 28406348214047496113497895
14 -19264981823338548859573191040
15 15061032335471422549306640625000

List of values

[1, -8, 190, -8880, 683375, -78206688, 12452171844, -2631354777600, 712425472573815, -240455417915625000, 98981390235327670642, -48810267466347374088192, 28406348214047496113497895, -19264981823338548859573191040, 15061032335471422549306640625000]

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

Content is available under The OEIS End-User License Agreement.