id:A048537 - OEIS Search Results

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a(n)*(a(n)+1) is smallest pronic number containing exactly n 4's.

+0
3

6, 66, 215, 681, 6681, 12018, 201115, 1531159, 6541784, 21058215, 156340764, 675098840 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`Eric Weisstein's World of Mathematics, Pronic Number`
	CROSSREFS	`Cf. A048538, A002378.` `Sequence in context: A101011 A119140 A085025 this_sequence A133424 A045641 A071276` `Adjacent sequences: A048534 A048535 A048536 this_sequence A048538 A048539 A048540`
	KEYWORD	`nonn,base,more`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), May 15 1999.`

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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.