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A075572 Smallest prime divisor of sum of three successive terms pertaining to A075571. +0
2
3, 5, 3, 7, 5, 3, 3, 5, 7, 3, 11, 11, 3, 3, 7, 5, 5, 5, 11, 13, 5, 11, 17, 3, 5, 13, 3, 3, 7, 5, 13, 5, 5, 7, 3, 13, 7, 3, 13, 5, 5, 7, 19, 7, 7, 23, 3, 5, 5, 23, 17, 7, 3, 3, 11, 19, 3, 29, 13, 29, 7, 7, 13, 3, 5, 5, 3, 5, 5, 13, 7, 5, 5, 5, 7, 5, 17, 17, 3, 31, 19, 3, 5, 11, 19, 37 (list; graph; listen)
OFFSET

0,1

PROGRAM

(PARI) pr=vector(10000):v=vector(100):v[1]=3:v[2]=5:pr[3]=1:pr[5]=1:for(n=3, 100, forprime(p=3, 10000, if(!pr[p]&&!isprime(v[n-2]+v[n-1]+p), print1(factor(v[n-2]+v[n-1]+p)[1, 1]", "):v[n]=p:pr[p]=1:break)))

CROSSREFS

Cf. A075571.

Adjacent sequences: A075569 A075570 A075571 this_sequence A075573 A075574 A075575

Sequence in context: A095366 A029604 A079602 this_sequence A089992 A074593 A137768

KEYWORD

nonn

AUTHOR

Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 25 2002

EXTENSIONS

Corrected and extended by Ralf Stephan (ralf(AT)ark.in-berlin.de), Mar 27 2003

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.


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