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Numbers with exactly 5 2's in their ternary expansion.
2

%I #13 Sep 13 2023 07:24:51

%S 242,485,566,647,674,701,710,719,722,725,726,727,971,1214,1295,1376,

%T 1403,1430,1439,1448,1451,1454,1455,1456,1538,1619,1646,1673,1682,

%U 1691,1694,1697,1698,1699,1781,1862,1889,1916

%N Numbers with exactly 5 2's in their ternary expansion.

%H Seiichi Manyama, <a href="/A023703/b023703.txt">Table of n, a(n) for n = 1..10000</a>

%t Select[ Range[ 2025 ], (Count[ IntegerDigits[ #, 3 ], 2 ]==5)& ]

%K nonn,base,easy

%O 1,1

%A _Olivier GĂ©rard_