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A164796
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a(n) = smallest number which has in its English name the letter "r" in the n-th position, -1 if such number no exist
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0
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-1, -1, 0, 4, 1000000000000, 4000000000000, 3000000000000, 43, 23, 24, 74, 24000000000000, 103, 104, 303, 304, 3004, 143, 123, 124, 174, 324, 374
(list; graph; refs; listen; history; internal format)
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