id:A069752 - OEIS Search Results

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Smallest k>n such that the triangular number n*(n+1)/2 divides the triangular number k*(k+1)/2.

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2, 3, 8, 15, 9, 14, 48, 63, 35, 44, 32, 39, 77, 20, 80, 255, 135, 152, 75, 35, 77, 230, 183, 200, 299, 324, 188, 203, 144, 155, 960, 351, 153, 84, 224, 296, 665, 246, 104, 615, 245, 258, 472, 99, 414, 1034, 704, 735, 1175, 374, 272, 636, 1377, 539, 175, 399, 551 (list; graph; listen)

	OFFSET	`1,1`
	PROGRAM	`(PARI) for(s=1, 80, n=s+1; while(frac(n*(n+1)/s/(s+1))>0, n++); print1(n, ", "); )`
	CROSSREFS	`Sequence in context: A076876 A124495 A007919 this_sequence A004731 A135354 A122412` `Adjacent sequences: A069749 A069750 A069751 this_sequence A069753 A069754 A069755`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), May 01 2002`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

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