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A164510 First differences of A071904 (Odd composite numbers). 2
6, 6, 4, 2, 6, 2, 4, 6, 4, 2, 4, 2, 6, 2, 4, 6, 2, 4, 4, 2, 4, 2, 2, 4, 6, 6, 4, 2, 2, 2, 2, 2, 4, 4, 2, 6, 2, 2, 2, 6, 2, 4, 2, 4, 4, 2, 4, 2, 6, 2, 2, 2, 6, 6, 2, 2, 2, 2, 4, 2, 2, 2, 2, 4, 6, 4, 2, 6, 2, 2, 2, 4, 2, 4, 2, 4, 2, 6, 2, 4, 6, 2, 2, 2, 4, 2, 2, 2, 2, 2, 4, 6, 4, 2, 2, 2, 2, 2, 4, 2, 4, 2, 2, 2, 6 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Are all terms <=6?
This is A067970 without its first term. [From R. J. Mathar, Aug 17 2009]
Yes, all terms are at most 6. For a value of 8, we have to have p, p+2, p+4 all prime, and this is possible only for p=3. As a result, 1 would have to be an odd composite number, which it is not. Therefore all terms are <=6. [From J. Lowell, Aug 17 2009]
LINKS
CROSSREFS
Sequence in context: A094888 A159702 A255188 * A019957 A099405 A090966
KEYWORD
nonn
AUTHOR
Zak Seidov, Aug 14 2009
STATUS
approved

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Last modified March 28 09:04 EDT 2024. Contains 371240 sequences. (Running on oeis4.)