A066164 Sum of interior angles in an n-sided polygon in degrees.

180, 360, 540, 720, 900, 1080, 1260, 1440, 1620, 1800, 1980, 2160, 2340, 2520, 2700, 2880, 3060, 3240, 3420, 3600, 3780, 3960, 4140, 4320, 4500, 4680, 4860, 5040, 5220, 5400, 5580, 5760, 5940, 6120, 6300, 6480, 6660, 6840, 7020, 7200, 7380, 7560, 7740

Offset

3,1

Links

Harry J. Smith, Table of n, a(n) for n = 3..1000

Tanya Khovanova, Recursive Sequences

Index entries for linear recurrences with constant coefficients, signature (2,-1).

Formula

a(n) = (n-2)*180.

Example

a(3) = 180, since the sum of the interior angles in a triangle is 180 degrees

Mathematica

180 Range[36] (* Alonso del Arte, Sep 22 2017 *)
LinearRecurrence[{2, -1}, {180, 360}, 50] (* Harvey P. Dale, Apr 06 2022 *)

Prog

(PARI) a(n) = { (n - 2)*180 } \\ Harry J. Smith, Feb 03 2010

Crossrefs

Sequence in context: A160134 A135193 A095650 * A008891 A015233 A307112

Adjacent sequences: A066161 A066162 A066163 * A066165 A066166 A066167

Keyword

nonn,easy

Author

Ulrich Schimke (ulrschimke(AT)aol.com), Dec 12 2001

Status

approved