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A132982 The non-prime-power "antimutinous" numbers. (Antimutinous numbers are those integers m, m >1, where m/p^k < p, p = largest prime divisor of m, p^k = largest power of p that divides m.) 1
6, 10, 14, 15, 18, 20, 21, 22, 26, 28, 33, 34, 35, 38, 39, 42, 44, 46, 50, 51, 52, 54, 55, 57, 58, 62, 65, 66, 68, 69, 74, 75, 76, 77, 78, 82, 85, 86, 87, 88, 91, 92, 93, 94, 95, 98, 99, 100, 102, 104, 106, 110, 111, 114, 115, 116, 117, 118, 119, 122, 123, 124, 129, 130 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..64.

EXAMPLE

30 = 2*3*5. 2*3 is > 5, so 30 is not in the sequence because 30 is mutinous (see A027854).

27 = 3^3. 27/3^3 is < 3, so 27 is antimutinous. But 27 is a power of a prime, so 27 is not in the sequence.

However, 20 = 2^2 * 5^1. And 20/5^1 is < 5, so 20 is antimutinous. Also, 20 is not a power of a prime. So 20 is in the sequence.

MATHEMATICA

a = {}; For[n = 2, n < 200, n++, If[ !PrimeQ[n], If[ ! Length[FactorInteger[n]] == 1, b = FactorInteger[n]; m = 0; For[j = 1, j < Length[b] + 1, j++, If[b[[j, 1]]^b[[j, 2]] > m, m = b[[j, 1]]^b[[j, 2]]]; If[n/m < FactorInteger[m][[1, 1]], AppendTo[a, n]]]]]]; a (* Stefan Steinerberger, Nov 20 2007 *)

CROSSREFS

Cf. A027855.

Sequence in context: A085234 A057714 A143907 * A300080 A069169 A230766

Adjacent sequences:  A132979 A132980 A132981 * A132983 A132984 A132985

KEYWORD

nonn

AUTHOR

Leroy Quet, Nov 19 2007

EXTENSIONS

More terms from Stefan Steinerberger, Nov 20 2007

STATUS

approved

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Last modified July 15 16:09 EDT 2019. Contains 325049 sequences. (Running on oeis4.)