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A023700
Numbers with exactly 2 2's in their ternary expansion.
2
8, 17, 20, 23, 24, 25, 35, 44, 47, 50, 51, 52, 56, 59, 60, 61, 65, 68, 69, 70, 72, 73, 75, 76, 89, 98, 101, 104, 105, 106, 116, 125, 128, 131, 132, 133, 137, 140, 141, 142, 146, 149, 150, 151, 153, 154, 156, 157, 164, 167, 168
OFFSET
1,1
LINKS
MATHEMATICA
Select[ Range[ 189 ], (Count[ IntegerDigits[ #, 3 ], 2 ]==2)& ]
CROSSREFS
Sequence in context: A075485 A217433 A271626 * A026231 A088488 A031458
KEYWORD
nonn,base,easy
STATUS
approved