id:A116471 - OEIS Search Results

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Values 2*(n -/+ 1)^2 sorted.

+0
5

0, 2, 8, 8, 18, 18, 32, 32, 50, 50, 72, 72, 98, 98, 128, 128, 162, 162, 200, 200, 242, 242, 288, 288, 338, 338, 392, 392, 450, 450, 512, 512, 578, 578, 648, 648, 722, 722, 800, 800, 882, 882, 968, 968, 1058, 1058, 1152, 1152, 1250, 1250, 1352, 1352, 1458, 1458 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`For n>2, consists of entries of A001105(n)=2*n^2 (n>1) that appear twice.` `The terms a(2)-a(8) give the number of elements in the periods 1-7 of the periodic table of the chemical elements. - Antti Karttunen (his-firstname.his-surname(AT)gmail.com), Aug 14 2008.`
	LINKS	`Wikipedia, Atomic electron configuration table` `Wikipedia, Periodic table`
	CROSSREFS	`A001105(n) = a(2n), for n >=1. Cf. also A016742.` `Sequence in context: A104537 A019240 A093907 this_sequence A146749 A064231 A156052` `Adjacent sequences: A116468 A116469 A116470 this_sequence A116472 A116473 A116474`
	KEYWORD	`nonn`
	AUTHOR	`Lekraj Beedassy (blekraj(AT)yahoo.com), Mar 17 2006`
	EXTENSIONS	`More terms from Joshua Zucker (joshua.zucker(AT)stanfordalumni.org), May 11 2006`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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