login
This site is supported by donations to The OEIS Foundation.

 

Logo

"Email this user" was broken Aug 14 to 9am Aug 16. If you sent someone a message in this period, please send it again.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A033188 Minimal difference of any increasing arithmetic progression of n primes. 7
0, 1, 2, 6, 6, 30, 150, 210, 210, 210, 2310, 2310, 30030, 30030, 30030, 30030, 510510, 510510, 9699690, 9699690, 9699690 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

The entries shown have been proved to be correct.

LINKS

Table of n, a(n) for n=1..21.

Jens Kruse Andersen, Status of minimal arithmetic progressions of primes

Eric Weisstein's World of Mathematics, Prime Arithmetic Progression.

Index entries for sequences related to primes in arithmetic progressions

FORMULA

David W. Wilson conjectures that a(n) = n# (n primorial, A034386) for n >= 8. If this is true then a(22) onwards are: 9699690, 223092870, 223092870, 223092870, 223092870, 223092870, 223092870, 6469693230, 6469693230, ...

CROSSREFS

Cf. A033189 (initial terms), A113872 (last terms).

Cf. A034386, A204189.

Sequence in context: A284008 A284576 A060114 * A093364 A113461 A061558

Adjacent sequences:  A033185 A033186 A033187 * A033189 A033190 A033191

KEYWORD

nonn,hard

AUTHOR

Eric W. Weisstein

EXTENSIONS

Entry revised Feb 02 2006 by N. J. A. Sloane, based on suggestions from Jens Kruse Andersen.

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified August 17 11:40 EDT 2017. Contains 290635 sequences.