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A254787 a(n)= least initial term of n consecutive primes {p(m),..,p(m+n-1)} such that all numbers {1+p(m),..,1+p(m+n-1)} are a product of the same number k primes, where p(m) is m-th prime A000040(m). 1
2, 3, 139, 557, 3821, 53609, 179659, 7190917, 3599100, 16687573, 20394197, 101439558 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Corresponding values of m are: 1,2,34,102,530,5462,16309,488739,3599100,308495917,20394197,101439558
Corresponding values of k are: 1,2,4,4,5,4,5,4,5,4,5,5
A023514(i=m,..,m+n-1) are of the same value.
LINKS
EXAMPLE
a(2)=3, because {p(2),p(3)}={3,5}, and {4,6}={2^2,2*3}, k=2;
a(3)=139, because {p(34),p(35),p(36)}={139,149,151}, and {140,150,152}={2^2*5*7,2*3*5^2,2^3*19}, k=4.
CROSSREFS
Sequence in context: A066908 A057738 A234999 * A042073 A124236 A371272
KEYWORD
nonn
AUTHOR
Zak Seidov, Feb 15 2015
STATUS
approved

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Last modified March 29 01:36 EDT 2024. Contains 371264 sequences. (Running on oeis4.)