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A107837
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Leftmost digit of a(n) represents the number of even digits in a(n); rightmost digit of a(n) represents the number of odd digits in a(n).
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0
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20, 112, 132, 152, 172, 192, 201, 221, 241, 261, 281, 1013, 1033, 1053, 1073, 1093, 1103, 1123, 1143, 1163, 1183, 1213, 1233, 1253, 1273, 1293, 1303, 1323, 1343, 1363, 1383, 1413, 1433, 1453, 1473, 1493, 1503, 1523, 1543, 1563, 1583, 1613, 1633, 1653
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| 20 has two even digits ("2" and "0") and zero odd digit; 112 has one even digit ("2") and two odd digits ("1" and "1"), etc.
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MATHEMATICA
| okQ[n_]:=Module[{idn=IntegerDigits[n]}, First[idn]== Count[idn, _?EvenQ]&&Last[idn]==Count[idn, _?OddQ]]; Select[Range[2000], okQ] (* From Harvey P. Dale, Mar 13 2011 *)
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CROSSREFS
| Sequence in context: A008383 A024192 A086605 * A206368 A121040 A044352
Adjacent sequences: A107834 A107835 A107836 * A107838 A107839 A107840
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KEYWORD
| base,easy,nonn
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AUTHOR
| Eric Angelini (eric.angelini(AT)kntv.be), Jun 12 2005
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