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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A174309 Value of the polynomial y = (x^(2n-1) + 1)/(x + 1) at the point x = discriminant of y. 7
 1, 13, 242203001, 22540681439108936194378057, 273892687731183836066546120028455556686378073137630689 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Table of n, a(n) for n=1..5. MATHEMATICA s = {}; Do[pol = Simplify[(x^n + 1)/(x + 1)]; d = Discriminant[pol, x]; AppendTo[s, pol /. x -> d], {n, 1, 10, 2}]; s PROG (PARI) a(n) = my(p=(x^(2*n-1) + 1)/(x + 1)); subst(p, x, poldisc(p)); \\ Michel Marcus, Mar 02 2023 CROSSREFS Cf. A174304, A174305, A174306, A174307, A174308, A174310, A174311. Sequence in context: A177027 A158750 A145744 * A081509 A177224 A145234 Adjacent sequences: A174306 A174307 A174308 * A174310 A174311 A174312 KEYWORD nonn AUTHOR Artur Jasinski, Mar 15 2010 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 April 19 19:02 EDT 2024. Contains 371798 sequences. (Running on oeis4.)