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 A296916 List of coefficients of reduced chromatic polynomial of icosahedron, highest order terms first. 2
 1, -24, 260, -1670, 6999, -19698, 36408, -40240, 20170 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS These are the coefficients when the chromatic polynomial of the icosahedron (see A296917) is divided by x*(x-1)*(x-2)*(x-3). REFERENCES N. Biggs, Algebraic Graph Theory, 2nd ed. Cambridge University Press, 1993. See p. 69. LINKS EXAMPLE The reduced chromatic polynomial is x^8-24*x^7+260*x^6-1670*x^5+6999*x^4-19698*x^3+36408*x^2-40240*x+20170. Multiplying by x*(x-1)*(x-2)*(x-3) and expanding we get the chromatic polynomial for the icosahedron, which is x^12 - 30*x^11 + 415*x^10 - 3500*x^9 + 20023*x^8 - 81622*x^7 + 241605*x^6 - 517360*x^5 + 780286*x^4 - 782108*x^3 + 463310*x^2 - 121020*x. CROSSREFS Cf. A296917, A218514. Sequence in context: A296575 A009175 A308054 * A187380 A000145 A286346 Adjacent sequences:  A296913 A296914 A296915 * A296917 A296918 A296919 KEYWORD sign,fini,full AUTHOR N. J. A. Sloane, Dec 22 2017 STATUS approved

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Last modified May 23 16:39 EDT 2022. Contains 353977 sequences. (Running on oeis4.)