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A214132
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Lesser term of smallest primitive friendly pair such that both terms are divisible by the n-th prime p and coprime to the primes below p.
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2
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6, 135, 14105, 15506071, 432712085377, 1890948943, 14783271043, 45847, 211838579, 147560225903398137982300169126840969637180767467, 12060713581457342807125295910808091355523729
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OFFSET
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1,1
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COMMENTS
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For n>2, instances are known up to 11 (p=31).
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LINKS
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EXAMPLE
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For n=1, the perfect numbers 6=2*3 and 28=2^2*7 (A214133) are primitive friendly.
For n=2, 135=3^3*5 and 819=3^2*7*13 (A214133) are primitive friendly.
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CROSSREFS
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KEYWORD
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hard,more,nonn
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AUTHOR
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STATUS
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approved
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