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A031007
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Triangle T(n,k): Write n in base 7, reverse order of digits, to get row n.
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18
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0, 1, 2, 3, 4, 5, 6, 0, 1, 1, 1, 2, 1, 3, 1, 4, 1, 5, 1, 6, 1, 0, 2, 1, 2, 2, 2, 3, 2, 4, 2, 5, 2, 6, 2, 0, 3, 1, 3, 2, 3, 3, 3, 4, 3, 5, 3, 6, 3, 0, 4, 1, 4, 2, 4, 3, 4, 4, 4, 5, 4, 6, 4, 0, 5, 1, 5, 2, 5, 3, 5, 4, 5, 5, 5, 6, 5, 0, 6, 1, 6, 2, 6, 3, 6, 4, 6, 5, 6, 6, 6
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OFFSET
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0,3
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LINKS
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Table of n, a(n) for n=0..90.
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MATHEMATICA
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Flatten[Table[Reverse[IntegerDigits[n, 7]], {n, 0, 50}]] (* Harvey P. Dale, Feb 25 2014 *)
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PROG
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(PARI) A031007(n, k=-1)={k<0&&error("Flattened sequence not yet implemented."); n\7^k%7} \\ Assuming that columns start with k=0 as in A030308, A030341, ... TO DO: implement flattened sequence, such that A030567(n)=a(n). - M. F. Hasler, Jul 21 2013
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CROSSREFS
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Cf. A030308, A030341, A030386, A031235, A030567, A031045, A031087, A031298 for the base-2 to base-10 analogs.
Sequence in context: A037849 A037885 A347729 * A010876 A309958 A055400
Adjacent sequences: A031004 A031005 A031006 * A031008 A031009 A031010
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KEYWORD
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nonn,base,tabf,less
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AUTHOR
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Clark Kimberling
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EXTENSIONS
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Initial 0 and better name by Philippe Deléham, Oct 20 2011
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STATUS
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approved
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