The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A280923

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A280923

Degree of O(n,C), the orthogonal group, as an algebraic variety.
(history; published version)

#15 by Susanna Cuyler at Mon Aug 13 09:08:56 EDT 2018

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reviewed

approved

#14 by Michel Marcus at Mon Aug 13 05:08:10 EDT 2018

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proposed

reviewed

#13 by Michel Marcus at Sun Aug 12 12:54:23 EDT 2018

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editing

proposed

#12 by Michel Marcus at Sun Aug 12 12:54:21 EDT 2018

LINKS

M. Brandt, D. Bruce, T. Brysiewicz, R. Krone, E. Robeva, <a href="https://arxiv.org/abs/1701.03200">The degree of SO(n)</a>, arXiv:1701.03200 [math.AG], 2017.

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proposed

editing

#11 by Jean-François Alcover at Sun Aug 12 12:51:50 EDT 2018

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editing

proposed

#10 by Jean-François Alcover at Sun Aug 12 12:51:47 EDT 2018

MATHEMATICA

a[n_] := 2^n Det[Table[Binomial[2n-2i-2j, n-2i], {i, 1, n/2}, {j, 1, n/2}]]

Table[a[n], {n, 2, 19}] (* Jean-François Alcover, Aug 12 2018 *)

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approved

editing

#9 by N. J. A. Sloane at Sat Jan 14 07:49:14 EST 2017

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proposed

approved

#8 by Michel Marcus at Sat Jan 14 00:36:39 EST 2017

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editing

proposed

#7 by Michel Marcus at Sat Jan 14 00:36:33 EST 2017

PROG

(PARI) a(n) = 2^n*matdet(matrix(n\2, n\2, i, j, binomial(2*n-2*i-2*j, n-2*i))); \\ Michel Marcus, Jan 14 2017

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proposed

editing

#6 by Omar E. Pol at Fri Jan 13 21:39:03 EST 2017

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editing

proposed

Discussion

Fri Jan 13

21:41

Omar E. Pol: Minor edits.