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 A074811 Least k such that prime(k) >= k*tau(k*n) where tau = A000005. 0
 1, 1, 1, 181, 1, 1061, 1, 1061, 181, 1061, 1, 40123, 1, 1061, 1061, 6473, 1, 40123, 1, 40123, 1061, 1061, 1, 1617211, 181, 1061, 1061, 40123, 1, 1617211, 1, 40123, 1061, 1061, 1061, 10553429, 1, 1061, 1061, 1617211, 1, 1617211, 1, 40123, 40123, 1061, 1, 69709687 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 COMMENTS Listed terms are = 1 or are primes. a(n) = 1 iff n = 1 or n is prime. - Bernard Schott, Apr 10 2020 LINKS PROG (PARI) a(n)=if(n<0, 0, my(s=1); while(prime(s)

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Last modified December 5 09:47 EST 2020. Contains 338945 sequences. (Running on oeis4.)