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A071373
Least number X such that the numbers from X to X+n-1 are, in some order, 1 * a prime, 2 * a prime, ..., n * a prime.
7
2, 3, 4, 6, 6, 18362, 2914913, 10780552, 1829413731, 1676641682, 21487725800101, 22755817971366481, 107271326364325201, 7272877497848202226
OFFSET
1,1
EXAMPLE
a(7)=2914913 because 2914913=1*2914913, 2914914=6*485819, 2914915=5*582983, 2914916=4*728729, 2914917=3*971639, 2914918=2*1457459 and 2914919=7*416417. The left factors are the integers 1 to 7; and the right factors are primes.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Don Reble, May 21 2002
EXTENSIONS
a(13)-a(14) from Don Reble, Sep 10 2012
a(4) and a(5) corrected by Sean A. Irvine, Jul 14 2024
STATUS
approved