A071336 - OEIS

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A071336

Number of vertices of Goldberg-Casper-Klug pseudo-icosahedra.

12, 32, 42, 72, 92, 122, 132, 162, 192, 212, 252, 272, 282, 312, 362, 372, 392, 432, 482, 492, 522, 572, 612, 632, 642, 672, 732, 752, 762, 792, 812, 842, 912, 932, 972, 1002, 1032, 1082, 1092, 1112, 1122, 1172, 1212, 1242, 1272, 1292, 1332, 1392, 1442, 1472 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`Refers to the capsomere count in virus architectural structures. Since the Loeschian numbers (A003136) of the form x^2 + xy + y^2 reduces to squares (A000290) when either x or y equals 0,a(n) contains A005901 which is 10*n^2 + 2.`
	REFERENCES	`I. Stewart, "Game, Set and Math", Chapter 6, Table 6.1 pp. 81 Penguin London 1991.`
	LINKS	`K. Urner, Synergetica:A case of Deja Vu`
	FORMULA	`a(n)=10*A003136(n) + 2.`
	CROSSREFS	`Sequence in context: A118528 A031118 A118785 * A051519 A166959 A134582` `Adjacent sequences: A071333 A071334 A071335 * A071337 A071338 A071339`
	KEYWORD	`nonn`
	AUTHOR	`Lekraj Beedassy (blekraj(AT)yahoo.com), Oct 30 2003`

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Last modified February 16 19:06 EST 2012. Contains 205945 sequences.