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.

2, 3, 4, 6, 6, 18362, 2914913, 10780552, 1829413731, 1676641682, 21487725800101, 22755817971366481, 107271326364325201, 7272877497848202226

Offset

1,1

Links

Table of n, a(n) for n=1..14.

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

Cf. A071367-A071372.

Sequence in context: A030209 A265399 A138588 * A344412 A143102 A013944

Adjacent sequences: A071370 A071371 A071372 * A071374 A071375 A071376

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