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A034235
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Number of quaternary codes of length 4 with n words.
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0
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1, 1, 4, 20, 223, 3227, 77194, 2097080, 57796870, 1502295684, 36065804158, 795109767172, 16115614918786, 301341514055753, 5220182848555434, 84132279974374399
(list; graph; refs; listen; history; internal format)
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