id:A078936 - OEIS Search Results

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Smallest divisor of n*(n+1)/2 that is >= sqrt(n*(n+1)/2).

+0
3

1, 3, 3, 5, 5, 7, 7, 6, 9, 11, 11, 13, 13, 15, 12, 17, 17, 19, 19, 15, 21, 23, 23, 20, 25, 27, 21, 29, 29, 31, 31, 24, 33, 35, 30, 37, 37, 39, 30, 41, 41, 43, 43, 33, 45, 47, 47, 42, 35, 51, 39, 53, 53, 45, 44, 42, 57, 59, 59, 61, 61, 63, 48, 52, 55, 67, 67, 51, 69, 71, 71, 73 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Greater side of integral rectangle with area n(n+1)/2 having minimal semiperimeter;` `a(n) = A033677(A000217(n));` `a(n) = A078934(n) - A078935(n); a(n)A078935(n) = A000217(n).`
	CROSSREFS	`Sequence in context: A110560 A069902 A085779 this_sequence A061794 A088524 A129337` `Adjacent sequences: A078933 A078934 A078935 this_sequence A078937 A078938 A078939`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Dec 17 2002`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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