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A238901
a(n) is the smallest k, 1<=k<=(p_n-3)/2, such that sum{i=1,...,p_n-2k-1} 2^(i-1) Binomial(k-1+i, k)/p_n is prime; a(n)=0, if such k does not exist.
1
1, 1, 1, 6, 2, 5, 10, 1, 3, 11, 8, 13, 21, 5, 8, 29, 19, 19, 37, 0, 11, 11, 45, 42, 25, 11, 41, 7, 62, 39, 55, 70, 29, 60, 49, 24, 1, 0, 47, 73, 49, 78, 52, 11, 80, 80, 28, 32, 0, 92, 117, 112, 43, 102, 19, 97, 47, 38, 140, 51, 152, 44, 43, 141
OFFSET
4,4
COMMENTS
Cf. comment in A238693.
LINKS
CROSSREFS
KEYWORD
nonn
AUTHOR
Vladimir Shevelev, Mar 06 2014
EXTENSIONS
More terms from Peter J. C. Moses, Mar 06 2014
STATUS
approved