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Search: id:A138793
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| A138793 |
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a(n) = concatenation of reversed digits of natural numbers from n down to 1. |
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+0
10
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| 1, 21, 321, 4321, 54321, 654321, 7654321, 87654321, 987654321, 1987654321, 1101987654321, 211101987654321, 31211101987654321, 4131211101987654321, 514131211101987654321, 61514131211101987654321
(list; graph; listen)
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OFFSET
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1,2
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MATHEMATICA
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b = {}; a = {}; Do[w = RealDigits[n]; w = First[w]; Do[AppendTo[a, w[[k]]], {k, 1, Length[w]}]; p = FromDigits[Reverse[a]]; AppendTo[b, p], {n, 1, 61}]; b (*Artur Jasinski*)
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CROSSREFS
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Cf. A104759
Cf. A000422, A116504, A007908, A116505, A104759, A138789, A138790.
Sequence in context: A069572 A057138 A104759 this_sequence A014925 A000422 A060554
Adjacent sequences: A138790 A138791 A138792 this_sequence A138794 A138795 A138796
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KEYWORD
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nonn,base
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Mar 30 2008, Apr 04 2008
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