[go: up one dir, main page]
login
The OEIS is supported by the many generous donors to the OEIS Foundation.
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A026987
a(n) = Sum_{k=0..n-1} T(n,k) * T(n,k+1), with T given by A026681.
0
1, 6, 35, 154, 613, 2882, 14995, 68730, 291606, 1378110, 7047087, 32801046, 143237183, 681449778, 3462931356, 16261134650, 72210836920, 345094694354, 1747534150303, 8253521588404, 37063741964059, 177681801860358, 897584067273979, 4256535683245074, 19269823577105032
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
Table of n, a(n) for n=1..25.
CROSSREFS
Sequence in context: A078799 A203288 A026957 * A375248 A030532 A333800
Adjacent sequences: A026984 A026985 A026986 * A026988 A026989 A026990
KEYWORD
nonn
AUTHOR
Clark Kimberling
EXTENSIONS
More terms from Sean A. Irvine, Oct 20 2019
STATUS
approved

Lookup Welcome Wiki Register Music Plot 2 Demos Index WebCam Contribute Format Style Sheet Transforms Superseeker Recents
The OEIS Community
Maintained by The OEIS Foundation Inc.
Last modified October 4 23:47 EDT 2024. Contains 376525 sequences.
License Agreements, Terms of Use, Privacy Policy