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0, 1, 1, 1, 12, 12, 12, 12, 12, 12, 100, 121, 122, 123, 123, 112, 123, 123, 123, 123, 100, 112, 121, 123, 123, 123, 121, 123, 123, 123, 100, 123, 1023, 1023, 1123, 1223, 1234, 1234, 1222, 1231, 1200, 1231, 1234, 1234, 1234, 1012, 1223, 1102, 1203, 1203, 1200
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,5
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REFERENCES
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D. E. Knuth, The Art of Computer Programming, vol. 4A, Combinatorial Algorithms, Section 7.2.1.5, p. 432, Problems 4 and 5.
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LINKS
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MATHEMATICA
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f[n_] := Block[{d = Prepend[IntegerDigits@ n, 0], a, b, w}, b = DeleteDuplicates@ d; a = Range[0, Length@ b]; w = FromDigits@ Flatten[Part[a, FirstPosition[b, #]] & /@ d]; w]; Table[f[n^2], {n, 0, 50}] (* Michael De Vlieger, Dec 09 2015, Version 10 *)
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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