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A147994
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Gray code base 4 applied to Hofstadter's(A005185 Hofstadter Q - sequence): a(n)=GrayCode[Hofstadter[n] - 1, 4].
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0
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0, 0, 1, 3, 3, 2, 6, 6, 7, 7, 7, 4, 4, 4, 13, 12, 13, 15, 15, 14, 14, 14, 14, 8, 11, 11, 8, 8, 8, 8, 2, 0, 0, 2, 6, 3, 2, 7, 6, 7, 5, 5, 4, 4, 4, 4, 4, 8, 4, 12, 11, 14, 13, 11, 11, 14, 8, 11, 8, 8, 8, 8, 4, 0, 9, 7, 3, 0, 5, 4, 6, 7, 4, 5, 4, 5, 13, 4, 12, 15, 14, 15, 15, 11, 14, 10, 9, 9, 11, 8, 8
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,4
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REFERENCES
| http://mathworld.wolfram.com/notebooks/Combinatorics/GrayCode.nb.
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FORMULA
| a(n)=GrayCode[Hofstadter[n] - 1, 4].
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MATHEMATICA
| << DiscreteMath`CombinatorialFunctions` (* rather than put in the whole code :needs GrayCode.nb *) Table[GrayCode[Hofstadter[n] - 1, 4], {n, 100}]
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CROSSREFS
| Sequence in context: A186111 A186813 A110898 * A106365 A200174 A086636
Adjacent sequences: A147991 A147992 A147993 * A147995 A147996 A147997
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KEYWORD
| nonn
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AUTHOR
| Roger L. Bagula and Gary W. Adamson (rlbagulatftn(AT)yahoo.com), Nov 18 2008
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