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!)
A051106 Second diagonal of triangle A048601. 1
1, 3, 14, 105, 1287, 26026, 873392, 48825972, 4559177300, 712438499850, 186574469114250, 81973527087903750, 60475684628083567500, 74966560165861256115000, 156232609877290216839177600 (list; graph; refs; listen; history; text; internal format)
OFFSET
2,2
LINKS
FORMULA
a(n) ~ Pi^(1/3) * exp(1/36) * 3^(3*n^2/2 - 3*n + 47/36) * n^(31/36) / (A^(1/3) * Gamma(1/3)^(2/3) * 2^(2*n^2 - 4*n + 31/12)), where A is the Glaisher-Kinkelin constant A074962. - Vaclav Kotesovec, Oct 26 2017
MATHEMATICA
Table[n*(2*n-3)!/(n-2)! * Product[((3*k + 1)!/(n + k)!), {k, 0, n-2}], {n, 2, 20}] (* Vaclav Kotesovec, Oct 26 2017 *)
CROSSREFS
Sequence in context: A163882 A271213 A167017 * A246731 A349584 A258298
KEYWORD
nonn,easy
AUTHOR
EXTENSIONS
More terms from James A. Sellers
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 February 25 06:40 EST 2024. Contains 370310 sequences. (Running on oeis4.)