The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A111780 Seventh column (m=6) of unsigned triangle A111595. 0
1, 42, 1204, 29736, 689850, 15647940, 354718980, 8137289160, 190349674515, 4561677870750, 112317990384600, 2846259737521200, 74306186469414900, 1999421553976446600, 55458660913310655000, 1585528821898619598000 (list; graph; refs; listen; history; text; internal format)
OFFSET
6,2
LINKS
FORMULA
E.g.f. (1/sqrt(1-x^2))*((x/(1-x))^6)/6!.
a(n)=(n!/6!)*sum(binomial(2*k, k)*binomial(n-2*k-1, 5)/(4^k), k=0..floor((n-6)/2)), n>=6.
CROSSREFS
Sequence in context: A260584 A004373 A001778 * A075922 A230939 A331858
KEYWORD
nonn,easy
AUTHOR
Wolfdieter Lang, Aug 23 2005
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 June 12 16:34 EDT 2024. Contains 373334 sequences. (Running on oeis4.)