login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A208983 Central terms of the triangle in A208101. 3
1, 2, 3, 14, 20, 110, 154, 910, 1260, 7752, 10659, 67298, 92092, 592020, 807300, 5259150, 7152444, 47071640, 63882940, 423830264, 574221648, 3834669566, 5188082354, 34834267234, 47073334100, 317506779800, 428634152730, 2902365981900, 3914819231400 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

a(2*n+1) = A126596(n).

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 0..1000

MATHEMATICA

T[_, 0] = 1; T[n_, 1] := n; T[n_, n_] := T[n - 1, n - 2]; T[n_, k_] /; 1 < k < n := T[n, k] = T[n - 1, k] + T[n - 1, k - 2];

a[n_] := T[2n, n];

Table[a[n], {n, 0, 30}] (* Jean-Fran├žois Alcover, Feb 03 2018, from A208101 *)

PROG

(Haskell)

a208983 n = a208101 (2 * n) n

CROSSREFS

Sequence in context: A284928 A294405 A160218 * A337609 A081615 A157903

Adjacent sequences:  A208980 A208981 A208982 * A208984 A208985 A208986

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Mar 04 2012

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 10 06:08 EDT 2022. Contains 356029 sequences. (Running on oeis4.)