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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.

A347061 Determinant of the (2n+1) X (2n+1) matrix with the (j,k)-entry (tan(Pi*(j-k)/(2n+1)))^2 (j,k = 0..2n).

Table of values

n a(n)
0 0
1 54
2 112500
3 1111783050
4 34170487129800
5 2547904546473882750
6 392729761077721859691900
7 111952195111563752746582031250
8 54383838324760862570403373592970000
9 42287009764195722177648795731701042023750
10 50090854432555768390858694036859976340444362500

List of values

[0, 54, 112500, 1111783050, 34170487129800, 2547904546473882750, 392729761077721859691900, 111952195111563752746582031250, 54383838324760862570403373592970000, 42287009764195722177648795731701042023750, 50090854432555768390858694036859976340444362500]

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

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