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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A067305 Second column of triangle A067304. 1
1, 5, 36, 328, 3440, 39408, 478912, 6068480, 79315200, 1061628160, 14480086016, 200540018688, 2812618092544, 39867889037312, 570237130752000, 8219880968028160, 119293333282291712, 1741605394647416832 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

FORMULA

a(n)= A067304(n+1, 1) = A067297(n+1) - A064340(n+1), n>=0.

G.f.: 4*(3+c(4*x))*(c(4*x)^3)/(1+c(4*x))^4 with c(x) g.f. of A000108 (Catalan).

CROSSREFS

Sequence in context: A027331 A091161 A135149 * A000806 A127132 A141764

Adjacent sequences:  A067302 A067303 A067304 * A067306 A067307 A067308

KEYWORD

nonn,easy

AUTHOR

Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de), Feb 05 2002

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 17 16:49 EST 2012. Contains 206058 sequences.