This site is supported by donations to The OEIS Foundation.

 Annual Appeal: Please make a donation to keep the OEIS running. In 2018 we replaced the server with a faster one, added 20000 new sequences, and reached 7000 citations (often saying "discovered thanks to the OEIS"). Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A063723 Number of vertices in the Platonic solids (in the order tetrahedron, cube, octahedron, dodecahedron, icosahedron). 14
 4, 8, 6, 20, 12 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Also number of faces of Platonic solids ordered by increasing ratios of volumes to their respective circumscribed spheres. See cross-references for actual ratios. - Rick L. Shepherd, Oct 04 2009 Also the expected lengths of nontrivial random walks along the edges of a Platonic solid from one vertex back to itself. - Jens Voß, Jan 02 2014 LINKS FORMULA a(n) = A063722(n) - A053016(n) + 2. EXAMPLE a(2) = 8 since a cube has eight vertices. CROSSREFS Cf. A053012, A060296, A060852. Cf. A165922 (tetrahedron), A049541 (octahedron), A165952 (cube), A165954 (icosahedron), A165953 (dodecahedron). - Rick L. Shepherd, Oct 04 2009 Cf. A234974. - Jens Voß, Jan 02 2014 Sequence in context: A288189 A064494 A119800 * A028269 A019650 A193081 Adjacent sequences:  A063720 A063721 A063722 * A063724 A063725 A063726 KEYWORD easy,fini,full,nonn AUTHOR Henry Bottomley, Aug 14 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 December 15 20:47 EST 2018. Contains 318154 sequences. (Running on oeis4.)