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 A117453 Perfect powers in more than one way. 11
 1, 16, 64, 81, 256, 512, 625, 729, 1024, 1296, 2401, 4096, 6561, 10000, 14641, 15625, 16384, 19683, 20736, 28561, 32768, 38416, 46656, 50625, 59049, 65536, 83521, 104976, 117649, 130321, 160000, 194481, 234256, 262144, 279841, 331776, 390625 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Corresponding values of ways for a(n) in A175066(n) for n >= 2. - Jaroslav Krizek, Jan 23 2010 LINKS Donovan Johnson, Table of n, a(n) for n = 1..10000 Eric Weisstein's World of Mathematics, Perfect Power EXAMPLE 16 = 2^4 = 4^2. MATHEMATICA s = Split@ Sort@ Flatten@ Table[ n^i, {n, 2, Sqrt@456975}, {i, 2, Log[n, 456975]}]; Union@ Flatten@ Select[s, Length@ # > 1 &] (* Robert G. Wilson v, Apr 12 2006 *) CROSSREFS Cf. A001597, A322449. Sequence in context: A062320 A233330 A322449 * A305242 A039370 A304476 Adjacent sequences:  A117450 A117451 A117452 * A117454 A117455 A117456 KEYWORD nonn AUTHOR Eric W. Weisstein, Mar 16 2006 EXTENSIONS More terms from Robert G. Wilson v, Apr 12 2006 STATUS approved

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Last modified January 19 09:35 EST 2019. Contains 319306 sequences. (Running on oeis4.)