The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A026993 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A026993

a(n) = Sum_{k=0..n-2} T(n,k) * T(n,k+2), with T given by A026692.
(history; published version)

#11 by Wesley Ivan Hurt at Thu Jul 28 21:40:42 EDT 2022

STATUS

editing

approved

#10 by Wesley Ivan Hurt at Thu Jul 28 21:40:36 EDT 2022

CROSSREFS

Cf. A026692.

STATUS

approved

editing

#9 by Joerg Arndt at Mon Oct 21 02:09:26 EDT 2019

STATUS

reviewed

approved

#8 by Michel Marcus at Mon Oct 21 01:24:25 EDT 2019

STATUS

proposed

reviewed

#7 by Sean A. Irvine at Mon Oct 21 00:10:07 EDT 2019

STATUS

editing

proposed

#6 by Sean A. Irvine at Mon Oct 21 00:10:03 EDT 2019

NAME

a(n) = Sum_{k=0..n-2} T(n,k) * T(n,k+2)}, 0<=k<=n-2, , with T given by A026692.

DATA

1, 6, 32, 180, 984, 4606, 22689, 114992, 567129, 2576582, 12586319, 63131004, 305635176, 1384074886, 6739962365, 33708050180, 162468169385, 737652413014, 3588021213950, 17917172173846, 86273708463456, 393163075111278, 1911781914938634, 9536792007640980, 45924386118166540

EXTENSIONS

More terms from Sean A. Irvine, Oct 21 2019

STATUS

approved

editing

#5 by Russ Cox at Fri Mar 30 18:56:13 EDT 2012

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

Clark Kimberling

Discussion

Fri Mar 30

18:56

OEIS Server: https://oeis.org/edit/global/285

#4 by N. J. A. Sloane at Sun Feb 20 03:00:00 EST 2005

NAME

a(n) = SUMSum{T(n,k)*T(n,k+2)}, 0<=k<=n-2, T given by A026692.

KEYWORD

nonn,new

nonn

#3 by N. J. A. Sloane at Sat Sep 13 03:00:00 EDT 2003

KEYWORD

nonn,new

nonn

AUTHOR

Clark Kimberling, (ck6(AT)evansville.edu)

#2 by N. J. A. Sloane at Fri May 16 03:00:00 EDT 2003

KEYWORD

nonn,new

nonn

AUTHOR

Clark Kimberling, ck6@cedar.(AT)evansville.edu