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

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A060892 n^8-n^6+n^4-n^2+1. 2
 1, 1, 205, 5905, 61681, 375601, 1634221, 5649505, 16519105, 42521761, 99009901, 212601841, 427016305, 810932305, 1468297741, 2551550401, 4278255361, 6951703105, 10986053005, 16936647121, 25536159601, 37737287281, 54762727405, 78163228705, 109884542401 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS a(n) = Phi_20(n) where Phi_k(x) is the k-th cyclotomic polynomial. LINKS Harry J. Smith, Table of n, a(n) for n=0,...,1000 Index entries for linear recurrences with constant coefficients, signature (9, -36, 84, -126, 126, -84, 36, -9, 1). FORMULA G.f.: (1-8*x+232*x^2+4012*x^3+15958*x^4+15832*x^5+4096*x^6+196*x^7+x^8)/ (1-x)^9. [Colin Barker, Apr 22 2012] MAPLE A060892 := proc(n)         numtheory[cyclotomic](20, n) ; end proc: seq(A060892(n), n=0..20) ; # R. J. Mathar, Feb 11 2014 PROG (PARI) { for (n=0, 1000, write("b060892.txt", n, " ", n^8 - n^6 + n^4 - n^2 + 1); ) } \\ Harry J. Smith, Jul 14 2009 CROSSREFS Sequence in context: A203889 A226564 A077457 * A203862 A289333 A015289 Adjacent sequences:  A060889 A060890 A060891 * A060893 A060894 A060895 KEYWORD nonn,easy AUTHOR N. J. A. Sloane, May 05 2001 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 January 23 07:07 EST 2020. Contains 331168 sequences. (Running on oeis4.)