login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A047109 T(2n,n), array T as in A047110. 0
1, 1, 5, 31, 151, 917, 5619, 33627, 210911, 1326395, 8366161, 53441835, 342477957, 2203613164, 14248253995, 92379163952, 600644552471, 3915699367751, 25579440322831, 167423682425912, 1097738520430457, 7208383257398805 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..21.

CROSSREFS

Sequence in context: A005826 A293716 A294692 * A293028 A165610 A092496

Adjacent sequences:  A047106 A047107 A047108 * A047110 A047111 A047112

KEYWORD

nonn

AUTHOR

Clark Kimberling. Definition revised Dec 08 2006

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 25 23:16 EDT 2021. Contains 348256 sequences. (Running on oeis4.)