id:A048539 - OEIS Search Results

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a(n)*(a(n)+1) is smallest pronic number containing exactly n 5's.

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7, 23, 74, 2248, 2292, 23506, 50552, 742667, 2357022, 22706949, 74555050, 703955648, 745020507 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`Eric Weisstein's World of Mathematics, Pronic Number`
	CROSSREFS	`Cf. A048540, A002378.` `Sequence in context: A147972 A002223 A034563 this_sequence A018886 A145842 A086908` `Adjacent sequences: A048536 A048537 A048538 this_sequence A048540 A048541 A048542`
	KEYWORD	`nonn,base,more`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), May 15 1999.`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.