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A033188 Minimal difference of any increasing arithmetic progression of n primes. 10
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
Eric Weisstein's World of Mathematics, Prime Arithmetic Progression.
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).
Sequence in context: A284008 A284576 A060114 * A093364 A113461 A061558
KEYWORD
nonn,hard
AUTHOR
EXTENSIONS
Entry revised Feb 02 2006 by N. J. A. Sloane, based on suggestions from Jens Kruse Andersen.
STATUS
approved

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Last modified March 29 06:44 EDT 2024. Contains 371265 sequences. (Running on oeis4.)