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Search: id:A145668
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| A145668 |
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a(n) = size of the n-th term in S(2) (defined in Comments). |
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+0
1
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| 2, 2, 1, 1, 5, 3, 4, 9, 2, 1, 1, 7, 4, 1, 1, 4, 1, 1, 1, 1, 1, 1, 1, 12, 1, 20, 1, 1, 1, 1
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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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.
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CROSSREFS
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Cf. A145667-A145674, A104080, A014234.
Sequence in context: A152937 A064552 A123585 this_sequence A129104 A092450 A014291
Adjacent sequences: A145665 A145666 A145667 this_sequence A145669 A145670 A145671
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KEYWORD
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nonn,base,more
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AUTHOR
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Edwin Clark (eclark(AT)math.usf.edu), Mar 17 2009
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