login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A316607 Decimal expansion of the seventh smallest known Salem number. 5
1, 2, 3, 0, 3, 9, 1, 4, 3, 4, 4, 0, 7, 2, 2, 4, 7, 0, 2, 7, 9, 0, 1, 7, 7, 9, 3, 8, 9, 7, 5, 2, 7, 9, 0, 1, 7, 5, 6, 6, 5, 7, 4, 4, 8, 9, 6, 6, 1, 7, 5, 6, 2, 4, 1, 4, 0, 1, 9, 1, 4, 2, 3, 6, 1, 7, 2, 8, 1, 3, 4, 4, 7, 8, 5, 3, 5, 4, 5, 4, 1, 6, 7, 3, 5, 9, 8, 4, 6, 5, 1, 6, 6, 2, 4, 0, 8, 5, 2, 8, 5, 6 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..102.

M. J. Mossinghoff, Small Salem Numbers

Eric Weisstein's MathWorld, Salem Constants.

Wikipedia, Salem number

FORMULA

p = 1 - x^3 - x^5 - x^7 + x^10.

EXAMPLE

1.2303914344072247027901779389752790175665744896617562414019142361728...

MATHEMATICA

c1 = {1, 0, 0, -1, 0, -1};

c2 = Join[c1, Reverse[Most[c1]]];

p = (x^Range[0, Length[c2] - 1]).c2;

sigma7 = Root[p, x, 2];

RealDigits[sigma7, 10, 102][[1]]

CROSSREFS

Cf. A073011 (sigma1), A219300 (sigma2), A306078 (sigma3 ), A306079 (sigma4), A316605 (sigma5), A316606 (sigma6), A316608 (sigma8), A316609 (sigma9), A316610 (sigma10).

Sequence in context: A035549 A245255 A180188 * A194365 A216217 A253283

Adjacent sequences:  A316604 A316605 A316606 * A316608 A316609 A316610

KEYWORD

nonn,cons

AUTHOR

Jean-Fran├žois Alcover, Jul 08 2018

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 23 22:41 EDT 2019. Contains 322389 sequences. (Running on oeis4.)