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A037463
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a(n)=Sum{d(i)*9^i: i=0,1,...,m}, where Sum{d(i)*4^i: i=0,1,...,m} is the base 4 representation of n.
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0
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1, 2, 3, 9, 10, 11, 12, 18, 19, 20, 21, 27, 28, 29, 30, 81, 82, 83, 84, 90, 91, 92, 93, 99, 100, 101, 102, 108, 109, 110, 111, 162, 163, 164, 165, 171, 172, 173, 174, 180, 181, 182, 183, 189, 190, 191, 192, 243, 244, 245, 246, 252, 253
(list; graph; refs; listen; history; internal format)
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