The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A276617 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A276617

Square array A(n,k) = A276955(n,k)/k!, read by descending antidiagonals as A(1,1), A(1,2), A(2,1), A(1,3), A(2,2), A(3,1), etc.
(history; published version)

#14 by N. J. A. Sloane at Sat Sep 24 10:47:35 EDT 2016

STATUS

proposed

approved

#13 by Antti Karttunen at Fri Sep 23 14:40:03 EDT 2016

STATUS

editing

proposed

#12 by Antti Karttunen at Fri Sep 23 10:30:47 EDT 2016

CROSSREFS

Row 8: A028387 (from a(2)=11 onward).

#11 by Antti Karttunen at Fri Sep 23 10:28:02 EDT 2016

CROSSREFS

Row 7: A028552 (from a(2)=10 onward).

#10 by Antti Karttunen at Fri Sep 23 09:56:26 EDT 2016

CROSSREFS

Row 1: A000012, Row 2: n+2, Row 3: 2n+2, Row 4: 2n+5 3 (for n >= 1).

Discussion

Fri Sep 23

10:24

Antti Karttunen: For the proof that row 5 is A002061(3..) see my PinkBox-comment in https://oeis.org/draft/A108217 : (n^2 - n + 1) * (n-2)! = (n^2 - n)*(n-2)! + (n-2)! = (n*(n-1))*(n-2)! + (n-2)! = n! + (n-2)!

#9 by Antti Karttunen at Fri Sep 23 09:55:27 EDT 2016

CROSSREFS

Column Columns 1-3: A273670, column 2: A276931, A276934.

#8 by Antti Karttunen at Fri Sep 23 09:54:32 EDT 2016

CROSSREFS

Row 1: A000012, Row 2: n+2, Row 3: 2n+2, Row 4: 2n+5 (for n >= 1).

Row 65: squares A002061 (A000290) from 9 a(3)=7 onward).

Row 6: squares (A000290, from a(3)=9 onward).

#7 by Antti Karttunen at Fri Sep 23 09:36:58 EDT 2016

LINKS

Antti Karttunen, <a href="/A276617/b276617.txt">Table of n, a(n) for n = 1..7260; the first 120 antidiagonals of array</a>

#6 by Antti Karttunen at Fri Sep 23 09:34:05 EDT 2016

LINKS

Antti Karttunen, <a href="/A276617/b276617.txt">Table of n, a(n) for n = 1..7260</a>

#5 by Antti Karttunen at Thu Sep 22 17:03:31 EDT 2016

CROSSREFS

Row 1: A000012.

Row 6: squares (A000290) from 9 onward.