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Search: id:A157936
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A157936 Numbers n divisible by the least prime >= sqrt(n). +0
5
2, 4, 6, 9, 10, 15, 20, 25, 28, 35, 42, 49, 55, 66, 77, 88, 99, 110, 121, 130, 143, 156, 169, 170, 187, 204, 221, 238, 255, 272, 289, 304, 323, 342, 361, 368, 391, 414, 437, 460, 483, 506, 529, 551, 580, 609, 638, 667, 696, 725, 754, 783, 812, 841, 868, 899, 930 (list; graph; listen)
OFFSET

1,1

COMMENT

Contains A001248, A006094 and A157937 as subsequences.

FORMULA

A157936 = A157937 union A001248

PROGRAM

(PARI) for( n=1, 1999, n % nextprime(sqrtint(n-1)+1) | print1(n", ")) /* sqrtint(n-1)+1 avoids rounding errors but can be replaced by sqrt(n) for small n */

CROSSREFS

Cf. A157942.

Sequence in context: A003661 A065387 A065388 this_sequence A024978 A085148 A059566

Adjacent sequences: A157933 A157934 A157935 this_sequence A157937 A157938 A157939

KEYWORD

nonn

AUTHOR

M. F. Hasler (MHasler(AT)univ-ag.fr), Mar 10 2009

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


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