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 A112769 Numbers with more than one prime factor and, in the ordered factorization, at least one exponent is less than the previous exponent when read from left to right. 12
 12, 20, 24, 28, 40, 44, 45, 48, 52, 56, 60, 63, 68, 72, 76, 80, 84, 88, 90, 92, 96, 99, 104, 112, 116, 117, 120, 124, 126, 132, 135, 136, 140, 144, 148, 152, 153, 156, 160, 164, 168, 171, 172, 175, 176, 180, 184, 188, 189, 192, 198, 200, 204, 207, 208, 212, 220 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS It appears that this sequence lists the integers x such that A085079(n) > n. - Michel Marcus, Jul 30 2015 LINKS Seiichi Manyama, Table of n, a(n) for n = 1..10000 EXAMPLE 90 = 2^1 * 3^2 * 5^1 and 2 > 1, so 90 is in sequence. MATHEMATICA mopfQ[n_]:=Module[{e=FactorInteger[n][[All, 2]]}, Length[e]>1&&Min[ Differences[ e]]<0]; Select[Range[300], mopfQ] (* Harvey P. Dale, May 30 2018 *) PROG (PARI) isok(n) = {f = factor(n)[, 2]; if (#f > 1, for (k=2, #f, if (f[k] < f[k-1], return (1)); ); ); return (0); } \\ Michel Marcus, Jul 30 2015 CROSSREFS Cf. A097318, A097319, A097320, A304678. Sequence in context: A316597 A329142 A362620 * A360253 A097320 A332956 Adjacent sequences: A112766 A112767 A112768 * A112770 A112771 A112772 KEYWORD nonn AUTHOR Ray Chandler, Sep 23 2005, based on a suggestion from Leroy Quet STATUS approved

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Last modified July 13 02:27 EDT 2024. Contains 374260 sequences. (Running on oeis4.)