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A167920
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Smallest single or isolated number==1(mod n).
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0
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2, 23, 4, 37, 6, 37, 113, 89, 37, 131, 12, 37, 53, 113, 211, 97, 18, 37, 457, 401, 127, 23, 47, 97, 251, 53, 163, 113, 30, 211, 373, 97, 67, 307, 211, 37, 223, 457, 79, 401, 42, 127, 173, 89, 541, 47, 941, 97, 491, 251, 307, 53, 743, 163, 331, 113, 457, 233, 60, 541
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OFFSET
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1,1
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LINKS
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EXAMPLE
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If n=72, the smallest single or isolated number in the sequence 73, 145, 217, 289, 361, 433, 505, 577, so a(72)=577.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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Corrected (a(2) replaced by 23, a(3) inserted, 113 replaced by 97, 337 by 97, 257 by 97 etc.) by R. J. Mathar, May 30 2010
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STATUS
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approved
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