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

 Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS"). Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A147776 Decimal expansion of z^(-3)+z^(-2)+z^(-1)+1+z+z^2+z^3, where z = exp(2*Pi*I/23). 0
 5, 9, 9, 9, 7, 7, 9, 6, 7, 0, 2, 2, 5, 8, 8, 3, 8, 6, 0, 8, 7, 5, 9, 5, 3, 5, 2, 4, 5, 9, 2, 0, 6, 0, 3, 5, 5, 0, 0, 3, 2, 8, 9, 7, 0, 0, 5, 1, 7, 8, 1, 0, 6, 9, 7, 3, 5, 6, 1, 5, 8, 4, 4, 7, 5, 0, 5, 8, 6, 9, 2, 2, 4, 8, 5, 7, 7, 0, 9, 0, 4, 3, 4, 0, 3, 0, 8, 6, 3, 9, 7, 0, 6, 7, 2, 8, 8, 4, 7 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS FORMULA 7 - 56*sin(Pi/23)^2 + 112*sin(Pi/23)^4 - 64*sin(Pi/23)^6. - Charles R Greathouse IV, Mar 25 2014 EXAMPLE 5.9997796702258838608759535245920603550032897005178106973561... PROG (PARI) subst(Pol([-64, 112, -56, 7]), 'x, sin(Pi/23)^2) \\ Charles R Greathouse IV, Mar 25 2014 CROSSREFS Cf. A147777. Sequence in context: A147818 A147777 A086731 * A020846 A180014 A105643 Adjacent sequences:  A147773 A147774 A147775 * A147777 A147778 A147779 KEYWORD nonn,cons AUTHOR N. J. A. Sloane, May 03 2009, based on a posting to the Number Theory List by Nigel Boston, Apr 29 2009 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 December 4 02:18 EST 2020. Contains 338921 sequences. (Running on oeis4.)