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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A366164 Decimal expansion of the absolute value of the imaginary part of the larger pair of the 4 complex roots of x^4 + x^2 + x + 1 = 0. 2
 1, 1, 2, 0, 8, 7, 3, 4, 8, 9, 9, 3, 7, 0, 5, 9, 3, 0, 2, 8, 5, 6, 0, 5, 5, 3, 5, 7, 3, 7, 3, 6, 3, 2, 1, 7, 3, 4, 8, 8, 5, 9, 1, 4, 1, 7, 3, 3, 3, 0, 7, 6, 1, 5, 7, 5, 5, 6, 9, 3, 6, 4, 8, 2, 1, 9, 4, 2, 8, 3, 5, 6, 8, 3, 8, 3, 4, 7, 5, 7, 0, 5, 1, 9, 1, 3, 7, 9, 3, 6, 4 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS The 4 roots are -(A366162) +- i*(A366163) and (A366162) +- i*D, where D is the constant given by this sequence. LINKS Table of n, a(n) for n=1..91. Index entries for algebraic numbers, degree 12 EXAMPLE 1.120873489937059302856055357373632173488591417333... PROG (PARI) vecmax (abs (imag (polroots (x^4 + x^2 + x + 1)))) (PARI) polrootsreal(4096*x^12 - 8192*x^10 + 7680*x^8 - 4480*x^6 - 368*x^4 - 312*x^2 + 257)[4] \\ Charles R Greathouse IV, Oct 27 2023 CROSSREFS Cf. A366162, A366163. Sequence in context: A318136 A168037 A019658 * A021483 A011015 A319586 Adjacent sequences: A366161 A366162 A366163 * A366165 A366166 A366167 KEYWORD nonn,cons AUTHOR Hugo Pfoertner, Oct 02 2023 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 21 10:46 EDT 2024. Contains 371852 sequences. (Running on oeis4.)