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A071913
Smallest k such that A069624(k) = n.
1
1, 4, 9, 27, 81, 256, 1024, 4096, 16384, 78125, 390625, 1953125, 10077696, 60466176, 362797056, 2176782336, 13841287201, 96889010407, 678223072849, 4747561509943, 35184372088832, 281474976710656, 2251799813685248
OFFSET
1,2
COMMENTS
All of entries shown are perfect powers.
MATHEMATICA
a = Table[0, {15}]; Do[ b = Length[ Union[ Table[ Floor[n^(1/k)], {k, 2, 20}]]]; If[ a[[b]] == 0, a[[b]] = n], {n, 1, 10^6}]; a
CROSSREFS
Cf. A069624.
Sequence in context: A365609 A198095 A256096 * A007872 A272016 A272089
KEYWORD
nonn
AUTHOR
Robert G. Wilson v, Jun 14 2002
STATUS
approved