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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 (list; graph; refs; listen; history; internal format)
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: A034527 A111962 A198095 * A007872 A087726 A101973

Adjacent sequences:  A071910 A071911 A071912 * A071914 A071915 A071916

KEYWORD

nonn

AUTHOR

Robert G. Wilson v (rgwv(AT)rgwv.com), Jun 14 2002

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Last modified February 16 14:37 EST 2012. Contains 205930 sequences.