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A157941
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Numbers n divisible by the largest prime < sqrt(n), A007917(A000196(n-1)).
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3
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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; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| 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.
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PROG
| (PARI) for( n=5, 999, n % precprime(sqrtint(n-1)) | print1(n", "))
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CROSSREFS
| Sequence in context: A063207 A096175 A027827 * A059611 A177085 A194409
Adjacent sequences: A157938 A157939 A157940 * A157942 A157943 A157944
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KEYWORD
| nonn
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AUTHOR
| M. F. Hasler (www.univ-ag.fr/~mhasler), Mar 09 2009
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