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A158579 a(n) = largest member of the n-th term in S(10) (defined in Comments). 4
7, 97, 997, 9973, 99991, 999983, 9999991, 294001, 505447, 584141, 604171, 929573, 971767, 99999989, 1062599, 1282529, 1524181, 2017963, 2474431, 2690201, 3070663, 3085553, 3326489, 4393139, 5152507, 5285767, 5564453, 5575259 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Let H(L,b) be the Hamming graph whose vertices are the sequences of length L over the alphabet {0,1,...,b-1} with adjacency being defined by having Hamming distance 1. Let P(L,b) be the subgraph of H(L,b) induced by the set of vertices which are base b representations of primes with L digits (not allowing leading 0 digits). Let S(b) be the sequence of all components of the graphs P(L,b), L>0, sorted by the smallest prime in a component.

LINKS

Table of n, a(n) for n=1..28.

CROSSREFS

A158576-A158579, A145667-A145674

Sequence in context: A127892 A125590 A068694 * A003618 A173833 A093172

Adjacent sequences:  A158576 A158577 A158578 * A158580 A158581 A158582

KEYWORD

base,hard,nonn

AUTHOR

W. Edwin Clark, Mar 21 2009

STATUS

approved

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Last modified November 18 14:25 EST 2017. Contains 294893 sequences.