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A111066
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Numbers with digits 1 and 2 and at least one of each.
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1
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12, 21, 112, 121, 122, 211, 212, 221, 1112, 1121, 1122, 1211, 1212, 1221, 1222, 2111, 2112, 2121, 2122, 2211, 2212, 2221, 11112, 11121, 11122, 11211, 11212, 11221, 11222, 12111, 12112, 12121, 12122, 12211, 12212, 12221, 12222, 21111, 21112
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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MATHEMATICA
| FromDigits /@ Select[ IntegerDigits[ Range[210], 3], Union[ # ] == {1, 2} &] (* Robert G. Wilson v *)
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CROSSREFS
| Equals A007931 minus A000042 and A002276; cf. A043494, A037415, A062289, A000225.
Sequence in context: A048344 A039402 A043225 * A201015 A044005 A134514
Adjacent sequences: A111063 A111064 A111065 * A111067 A111068 A111069
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KEYWORD
| easy,nonn,base
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AUTHOR
| Alexandre Wajnberg & Youri Mora (alexandre.wajnberg(AT)skynet.be), Oct 08 2005
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EXTENSIONS
| More terms from Robert G. Wilson v (rgwv(at)rgwv.com), Oct 09 2005
Crossrefs from Charles R Greathouse IV (charles.greathouse(AT)case.edu), Aug 03 2010
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