id:A062857 - OEIS Search Results

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Size of smallest square multiplication table which contains some number n times.

+0
7

1, 2, 4, 6, 12, 12, 18, 20, 30, 30, 40, 40, 60, 60, 72, 72, 90, 90, 120, 120, 140, 140, 168, 168, 180, 180, 210, 210, 252, 252, 280, 280, 315, 315, 336, 336, 360, 360, 420, 420, 504, 504, 560, 560, 630, 630, 672, 672, 720, 720, 792, 792, 840, 840, 924, 924, 990 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`a(7)=18 because the 18 X 18 multiplication table is the smallest to contain a product of frequency 7 (namely the number A062856[7]=36).`
	CROSSREFS	`The least such number is A062856[n].` `Cf. A027424, A062851, A062854, A062855, A062856, A062858, A062859.` `Sequence in context: A136103 A053146 A056675 this_sequence A061799 A076868 A056793` `Adjacent sequences: A062854 A062855 A062856 this_sequence A062858 A062859 A062860`
	KEYWORD	`nonn`
	AUTHOR	`Ron Lalonde (ronronronlalonde(AT)hotmail.com), Jun 25 2001`
	EXTENSIONS	`More terms from Don Reble (djr(AT)nk.ca), Nov 08 2001`

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Last modified November 23 10:40 EST 2009. Contains 167421 sequences.

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