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A250003
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Number of inequivalent binary linear codes of length n minus 2^n.
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1
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0, 0, 0, 0, 0, 0, 4, 20, 86, 336, 1273, 4880, 19938, 90662, 486753, 3285964, 29643278, 373908194, 6739368109, 173801125420, 6356254132640, 326203515419552, 23294352975946580, 2301176047756537128, 313285408199163993419, 58638266023262469408284
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OFFSET
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0,7
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COMMENTS
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The numbers of inequivalent binary linear codes of length n (A076766) start like the powers of two (A000079). This sequence is their difference. These are the row sums of the triangle A250002.
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LINKS
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FORMULA
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EXAMPLE
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There are 342 inequivalent binary linear codes of length 8, and 2^8 = 256, hence a(8) = 342 - 256 = 86.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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