id:A157941 - OEIS Search Results

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Numbers n divisible by the largest prime < sqrt(n), A007917(A000196(n-1)).

+0
4

6, 8, 12, 15, 18, 21, 24, 30, 35, 40, 45, 56, 63, 70, 77, 84, 91, 98, 105, 112, 119, 132, 143, 154, 165, 182, 195, 208, 221, 234, 247, 260, 273, 286, 306, 323, 340, 357, 380, 399, 418, 437, 456, 475, 494, 513, 552, 575, 598, 621, 644, 667, 690, 713, 736, 759 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Includes products of pairs of consecutive primes (A006094) as subsequence, equals A157942 with squares of primes (A001248) removed.` `For a number < 5 the definition does not make much sense, since there is no prime < sqrt(4) = 2, so we don't consider them here.`
	PROGRAM	`(PARI) for( n=5, 999, n % precprime(sqrtint(n-1)) \| print1(n", "))`
	CROSSREFS	`Sequence in context: A063207 A096175 A027827 this_sequence A059611 A115166 A050992` `Adjacent sequences: A157938 A157939 A157940 this_sequence A157942 A157943 A157944`
	KEYWORD	`nonn`
	AUTHOR	`M. F. Hasler (MHasler(AT)univ-ag.fr), Mar 09 2009`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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