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A261672
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Numbers k such that A037610(k) is prime.
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0
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OFFSET
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1,1
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COMMENTS
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The terms are a subset of the terms of A016777, since a term of A037610 can only be prime if it is congruent to 1 modulo 10 and hence congruent to 1 modulo 3. If A037610(k) is congruent to 1 modulo 3, then k is congruent to 1 modulo 3 as well.
No further terms up to 10000.
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LINKS
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EXAMPLE
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A037610(7) = 1231231 is prime, so 7 is a term of the sequence.
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MATHEMATICA
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PROG
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(PARI) a037610(n) = 10^n*41\333
is(n) = ispseudoprime(a037610(n))
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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