The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A203763 Vandermonde sequence using x^2 - xy + y^2 applied to (1,1,2,2,...,[n/2]). 4
 1, 1, 9, 324, 777924, 16810159716, 69136555917409344, 4549499535875623543259136, 115306876482136485813839025883201536, 73061199694724861313901918528002630365482598400 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS See A093883 for a discussion and guide to related sequences. LINKS MATHEMATICA f[j_] := Floor[(j + 1)/2]; z = 16; u := Product[f[j]^2 - f[j] f[k] + f[k]^2, {j, 1, k - 1}] v[n_] := Product[u, {k, 2, n}] Table[v[n], {n, 1, z}]        (* A203763 *) Table[v[n + 1]/v[n], {n, 1, z}]  (* A203764 *) Table[Sqrt[v[n + 1]/v[n]], {n, 1, 20}]  (* A203765 *) CROSSREFS Sequence in context: A211087 A211091 A124070 * A041619 A111968 A289196 Adjacent sequences:  A203760 A203761 A203762 * A203764 A203765 A203766 KEYWORD nonn AUTHOR Clark Kimberling, Jan 05 2012 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified October 20 02:09 EDT 2020. Contains 337897 sequences. (Running on oeis4.)