The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A306928

(Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A306928

Number of different values taken by the determinant of a real (0,1,2) matrix of order n.
(history; published version)

#15 by Peter Luschny at Thu May 30 03:06:11 EDT 2024

STATUS

proposed

approved

#14 by Michel Marcus at Thu May 30 01:16:35 EDT 2024

STATUS

editing

proposed

#13 by Michel Marcus at Thu May 30 01:16:31 EDT 2024

EXTENSIONS

a(0)-a(5) confirmed and a(6) added by _from _Minfeng Wang_, May 29 2024

STATUS

proposed

editing

#12 by Michel Marcus at Wed May 29 07:24:26 EDT 2024

STATUS

editing

proposed

Discussion

Wed May 29

17:14

Michel Marcus: did you see A197487 discussion ?

#11 by Michel Marcus at Wed May 29 07:24:12 EDT 2024

EXTENSIONS

a(0)-a(5) confirmed and a(6) added by _Minfeng Wang, _, May 29 2024

STATUS

proposed

editing

Discussion

Wed May 29

07:24

Michel Marcus: signature corrected, again ....

#10 by Minfeng Wang at Wed May 29 07:10:37 EDT 2024

STATUS

editing

proposed

#9 by Minfeng Wang at Wed May 29 07:09:44 EDT 2024

DATA

1, 3, 9, 25, 67, 233, 893

LINKS

Minfeng Wang, <a href="/A306928/a306928.cpp.txt">C++ program to calculate A306928</a>

EXTENSIONS

a(0)-a(5) confirmed and a(6) added by Minfeng Wang, May 29 2024

STATUS

approved

editing

Discussion

Wed May 29

07:10

Minfeng Wang: Upload one more term and the source code.

#8 by Alois P. Heinz at Sat Mar 16 22:18:44 EDT 2019

STATUS

editing

approved

#7 by Alois P. Heinz at Sat Mar 16 22:17:05 EDT 2019

NAME

Number of different values taken by the determinant of a real n X n (0,1,2) matrix of order n.

Discussion

Sat Mar 16

22:17

Alois P. Heinz: ... makes it more consistent to other sequences of this kind.

22:18

Alois P. Heinz: ... publishing now ...

#6 by Alois P. Heinz at Sat Mar 16 21:57:44 EDT 2019

DATA

1, 3, 9, 25, 67, 233

OFFSET

1,1

0,2

Discussion

Sat Mar 16

21:59

Alois P. Heinz: ... since the determinant of the empty matrix can take only one value, namely 1.

22:09

Alois P. Heinz: https://en.wikipedia.org/wiki/Matrix_(mathematics)#Empty_matrices