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A132199 First differences of A106108. +0
3
1, 1, 1, 5, 3, 1, 1, 1, 1, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 23, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 47, 3, 1, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 101, 3, 1, 1 (list; graph; listen)
OFFSET

1,4

COMMENT

Rowland shows that the terms are all 1's or primes.

The prime terms form A137613.

See A137613 for additional comments, links, and references. [From Jonathan Sondow (jsondow(AT)alumni.princeton.edu), Aug 14 2008]

REFERENCES

Eric S. Rowland, A simple prime-generating recurrence, Abstracts Amer. Math. Soc., 29 (No. 1, 2008), p. 50 (Abstract 1035-11-986).

Jean-Paul Delahaye, Fascinantes conjectures, Pour la science (French edition of Scientific American), No. 5, 2008

LINKS

Eric S. Rowland, A simple prime-generating recurrence.

CROSSREFS

See A106108 for other cross-references.

Sequence in context: A144481 A065469 A126853 this_sequence A111142 A094853 A096937

Adjacent sequences: A132196 A132197 A132198 this_sequence A132200 A132201 A132202

KEYWORD

nonn

AUTHOR

njas, Jan 28 2008

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Last modified December 3 01:16 EST 2008. Contains 151161 sequences.


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