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A023736 Numbers with exactly 3 3's in their base-5 expansion. 2

%I #13 Feb 23 2019 21:48:16

%S 93,218,343,393,418,443,453,458,463,465,466,467,469,473,493,593,718,

%T 843,968,1018,1043,1068,1078,1083,1088,1090,1091,1092,1094,1098,1118,

%U 1218,1343,1468,1593,1643,1668,1693,1703,1708

%N Numbers with exactly 3 3's in their base-5 expansion.

%H Nathaniel Johnston, <a href="/A023736/b023736.txt">Table of n, a(n) for n = 1..10000</a>

%p seq(`if`(numboccur(3,convert(n,base,5))=3,n,NULL),n=0..2000); # _Nathaniel Johnston_, Jun 27 2011

%t Select[ Range[ 1750 ], (Count[ IntegerDigits[ #, 5 ], 3 ]==3)& ]

%Y Cf. A023733, A023734, A023735.

%K nonn,base,easy

%O 1,1

%A _Olivier GĂ©rard_

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)