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Search: id:A073792
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| A073792 |
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Replace 5^k with (-5)^k in base 5 expansion of n. |
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+0
9
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| 0, 1, 2, 3, 4, -5, -4, -3, -2, -1, -10, -9, -8, -7, -6, -15, -14, -13, -12, -11, -20, -19, -18, -17, -16, 25, 26, 27, 28, 29, 20, 21, 22, 23, 24, 15, 16, 17, 18, 19, 10, 11, 12, 13, 14, 5, 6, 7, 8, 9, 50, 51, 52, 53, 54, 45, 46, 47, 48, 49, 40, 41, 42, 43, 44, 35, 36, 37, 38, 39, 30, 31, 32, 33, 34
(list; graph; listen)
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OFFSET
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0,3
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COMMENT
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Base 5 representation for n (in lexicographic order) converted from base -5 to base 10.
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MATHEMATICA
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f[n_Integer, b_Integer] := Block[{l = IntegerDigits[n]}, Sum[l[[ -i]]*(-b)^(i - 1), {i, 1, Length[l]}]]; a = Table[ FromDigits[ IntegerDigits[n, 5]], {n, 0, 80}]; b = {}; Do[b = Append[b, f[a[[n]], 5]], {n, 1, 80}]; b
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CROSSREFS
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Cf. A007091, A073786, A053985, A065369, A073791, A073793, A073794, A073795, A073796 & A073835.
Sequence in context: A086144 A131974 A062406 this_sequence A017870 A017860 A017850
Adjacent sequences: A073789 A073790 A073791 this_sequence A073793 A073794 A073795
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KEYWORD
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base,easy,sign
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 12 2002
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