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A061234 Smallest number with prime(n)^2 divisors where prime(n) is the n-th prime. 4
6, 36, 1296, 46656, 60466176, 2176782336, 2821109907456, 101559956668416, 131621703842267136, 6140942214464815497216, 221073919720733357899776, 10314424798490535546171949056, 13367494538843734067838845976576 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
a(n) = Min_{x : d(x) = A000005(x) = p(n)^2} = 6^(p(n)-1) because x = 2^(pp-1) > 2^(p-1)3^(p-1) holds if p > 1.
EXAMPLE
1296 = 2*2*2*2*3*3*3*3 is the smallest number with 25 divisors.
CROSSREFS
Sequence in context: A203106 A351796 A069031 * A061584 A197191 A208655
KEYWORD
nonn
AUTHOR
Labos Elemer, Jun 01 2001
STATUS
approved

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Last modified May 26 02:25 EDT 2024. Contains 372807 sequences. (Running on oeis4.)