The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A193681 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A193681

Discriminant of minimal polynomial of 2*cos(Pi/n) (see A187360).
(history; published version)

#24 by Alois P. Heinz at Tue Oct 22 03:25:11 EDT 2024

STATUS

proposed

approved

#23 by Jason Yuen at Tue Oct 22 01:32:56 EDT 2024

STATUS

editing

proposed

#22 by Jason Yuen at Tue Oct 22 01:32:38 EDT 2024

LINKS

Ed Pegg Jr, <a href="/A193681/a193681.jpg">Table illustrating A193681</a> {(Each box gives n , , degree (A055034 phi(2*n)/2) / , and determinant (A193681this sequence) .)

STATUS

approved

editing

#21 by N. J. A. Sloane at Sat Feb 03 09:28:42 EST 2018

STATUS

editing

approved

#20 by N. J. A. Sloane at Sat Feb 03 09:28:40 EST 2018

LINKS

N. J. A. Sloane, Ed Pegg Jr, <a href="/A193681/a193681.jpg">TITLE FOR LINKTable illustrating A193681</a> {Each box gives n , degree (A055034 phi(2*n)/2) / determinant (A193681) .)

STATUS

approved

editing

#19 by N. J. A. Sloane at Sat Feb 03 09:24:45 EST 2018

STATUS

editing

approved

#18 by N. J. A. Sloane at Sat Feb 03 09:24:42 EST 2018

LINKS

N. J. A. Sloane, <a href="/A193681/a193681.jpg">TITLE FOR LINK</a>

STATUS

approved

editing

#17 by Bruno Berselli at Thu Aug 13 03:59:27 EDT 2015

STATUS

proposed

approved

#16 by Robert Israel at Tue Aug 04 02:23:42 EDT 2015

STATUS

editing

proposed

#15 by Robert Israel at Tue Aug 04 02:23:18 EDT 2015

NAME

Discriminants Discriminant of minimal polynomials polynomial of 2*cos(Pi/n), (see A187360).

CROSSREFS

Cf. A055034, A127670, A187360, A193678.

STATUS

proposed

editing