The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A208653 a(n) = Product_{i=floor((n + 1)/2)..n-1} binomial(n-1, i). 4
 1, 1, 1, 3, 4, 50, 90, 5145, 12544, 3429216, 11340000, 15219319500, 68309049600, 457937132487120, 2790771598030416, 94609025993497640625, 783056974947287040000, 135476575389769051389952000, 1523136299736565293430210560, 1354434926051634531310373234715648 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 COMMENTS Used with A208652 to count palindromic paths for A208654. LINKS Table of n, a(n) for n=1..20. MATHEMATICA m[n_]:=Floor[(n+1)/2]; z=21; h[n_]:=Product[Binomial[n-1, i], {i, m[n], n-1}] Table[h[n], {n, 1, z}] (* A208653 *) CROSSREFS Cf. A208652, A208654. Sequence in context: A198051 A032839 A056855 * A080073 A032840 A114694 Adjacent sequences: A208650 A208651 A208652 * A208654 A208655 A208656 KEYWORD nonn AUTHOR Clark Kimberling, Mar 02 2012 EXTENSIONS Definition corrected by Georg Fischer, Feb 01 2022 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.

Last modified February 29 04:26 EST 2024. Contains 370401 sequences. (Running on oeis4.)