# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a362606 Showing 1-1 of 1 %I A362606 #5 May 06 2023 09:03:02 %S A362606 6,10,14,15,21,22,26,30,33,34,35,36,38,39,42,46,51,55,57,58,60,62,65, %T A362606 66,69,70,74,77,78,82,84,85,86,87,90,91,93,94,95,100,102,105,106,110, %U A362606 111,114,115,118,119,120,122,123,126,129,130,132,133,134,138,140 %N A362606 Numbers without a unique least prime exponent, or numbers whose prime factorization has more than one element of least multiplicity. %C A362606 First differs from A130092 in lacking 180. %C A362606 First differs from A351295 in lacking 180 and having 216. %C A362606 First differs from A362605 in having 60. %e A362606 The prime factorization of 1800 is {2,2,2,3,3,5,5}, and the parts of least multiplicity are {3,5}, so 1800 is in the sequence. %e A362606 The terms together with their prime indices begin: %e A362606 6: {1,2} %e A362606 10: {1,3} %e A362606 14: {1,4} %e A362606 15: {2,3} %e A362606 21: {2,4} %e A362606 22: {1,5} %e A362606 26: {1,6} %e A362606 30: {1,2,3} %e A362606 33: {2,5} %e A362606 34: {1,7} %e A362606 35: {3,4} %e A362606 36: {1,1,2,2} %e A362606 38: {1,8} %e A362606 39: {2,6} %e A362606 42: {1,2,4} %t A362606 Select[Range[100],Count[Last/@FactorInteger[#],Min@@Last/@FactorInteger[#]]>1&] %Y A362606 The complement is A359178, counted by A362610. %Y A362606 For mode we have A362605, counted by A362607. %Y A362606 Partitions of this type are counted by A362609. %Y A362606 These are the positions of terms > 1 in A362613. %Y A362606 A112798 lists prime indices, length A001222, sum A056239. %Y A362606 A362614 counts partitions by number of modes. %Y A362606 A362615 counts partitions by number of co-modes. %Y A362606 Cf. A215366, A327473, A327476, A353864, A356862, A359908, A362611. %K A362606 nonn %O A362606 1,1 %A A362606 _Gus Wiseman_, May 05 2023 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE