id:A072862 - OEIS Search Results

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The smallest k>1 such that k divides sigma(k*n) is equal to 6.

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7

1, 4, 9, 16, 25, 36, 64, 81, 100, 121, 144, 225, 256, 289, 324, 400, 484, 529, 576, 625, 729, 841, 900, 1024, 1089, 1156, 1296, 1600, 1681, 1936, 2025, 2116, 2209, 2304, 2401, 2500, 2601, 2809, 2916, 3025, 3364, 3481, 3600, 4096, 4356, 4624, 4761, 5041 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`The smallest k>1 such that k divides sigma(k*n) is always 2, 3 or 6. Sequence generates squares but not all the squares (49 is the first missing square).`
	CROSSREFS	`Solutions to Mod[A000203(x), 6]=1.` `Sequence in context: A133743 A028820 A122683 this_sequence A062295 A068802 A075056` `Adjacent sequences: A072859 A072860 A072861 this_sequence A072863 A072864 A072865`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Jul 26 2002`

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Last modified November 24 14:25 EST 2009. Contains 167438 sequences.

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