login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A026649 a(n) = T(2n,n), T given by A026648. 0
1, 3, 8, 36, 114, 558, 1856, 9384, 31942, 164322, 566928, 2948184, 10262004, 53761068, 188306112, 991821456, 3490234182, 18458523378, 65190481904, 345875613144, 1225052975644, 6516499594212, 23134851823872, 123325174525104 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

CROSSREFS

Sequence in context: A194090 A020099 A005635 * A148919 A087905 A020111

Adjacent sequences:  A026646 A026647 A026648 * A026650 A026651 A026652

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 13 13:52 EST 2012. Contains 205489 sequences.