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A037455
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a(n)=Sum{d(i)*7^i: i=0,1,...,m}, where Sum{d(i)*3^i: i=0,1,...,m} is the base 3 representation of n.
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0
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1, 2, 7, 8, 9, 14, 15, 16, 49, 50, 51, 56, 57, 58, 63, 64, 65, 98, 99, 100, 105, 106, 107, 112, 113, 114, 343, 344, 345, 350, 351, 352, 357, 358, 359, 392, 393, 394, 399, 400, 401, 406, 407, 408, 441, 442, 443, 448, 449, 450, 455
(list; graph; refs; listen; history; internal format)
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