The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A007754 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A007754

Array (a frieze pattern) defined by a(n,k) = (a(n-1,k)*a(n-1,k+1) - 1) / a(n-2,k+1), read by antidiagonals.
(history; published version)

#33 by Michel Marcus at Tue Jun 06 05:05:58 EDT 2023

STATUS

reviewed

approved

#32 by Joerg Arndt at Tue Jun 06 04:32:06 EDT 2023

STATUS

proposed

reviewed

#31 by Alois P. Heinz at Mon Jun 05 11:12:04 EDT 2023

STATUS

editing

proposed

#30 by Alois P. Heinz at Mon Jun 05 11:10:20 EDT 2023

CROSSREFS

Main diagonal gives A099933.

STATUS

proposed

editing

#29 by Andrey Zabolotskiy at Mon Jun 05 11:00:21 EDT 2023

STATUS

editing

proposed

#28 by Andrey Zabolotskiy at Mon Jun 05 10:57:03 EDT 2023

EXAMPLE

1 1 1 1 1 1 1 1 ...

1 2 3 4 5 6 7 ...

1 5 11 19 29 41 ...

2 18 52 110 198 ...

7 85 301 751 ...

STATUS

approved

editing

Discussion

Mon Jun 05

11:00

Andrey Zabolotskiy: Added spaces, so the example now looks like a frieze pattern, as the name suggests.

#27 by Charles R Greathouse IV at Thu Sep 22 10:49:48 EDT 2016

STATUS

reviewed

approved

#26 by Joerg Arndt at Thu Sep 22 10:40:22 EDT 2016

STATUS

proposed

reviewed

#25 by Seiichi Manyama at Thu Sep 22 10:38:20 EDT 2016

STATUS

editing

proposed

#24 by Seiichi Manyama at Thu Sep 22 10:37:02 EDT 2016

LINKS

Seiichi Manyama, <a href="/A007754/b007754.txt">Table of n, a(n) for n = 0..10000</a>

STATUS

approved

editing