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Search: id:A125098
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| 0, 1, 10, 11, 12, 100, 101, 102, 110, 111, 112, 120, 121, 122, 123, 1000, 1001, 1002, 1010, 1011, 1012, 1020, 1021, 1022, 1023, 1100, 1101, 1102, 1110, 1111, 1112, 1120, 1121, 1122, 1123, 1200, 1201, 1202, 1203, 1210, 1211, 1212, 1213, 1220, 1221, 1222
(list; graph; listen)
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OFFSET
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0,3
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COMMENT
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Also, numbers n such that A123895(n) = n. Each digit is either 0, has occurred before, or is one more than the largest preceding digit. The number of k-digit numbers in this sequence is A005493(k-1) for 2<=k<=9. The initial 0 prevents a match for k=1; later values fall short because there are no digits beyond 9 available in decimal.
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CROSSREFS
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Cf. A123895, A005493.
Sequence in context: A144582 A048024 A048002 this_sequence A058944 A167178 A077677
Adjacent sequences: A125095 A125096 A125097 this_sequence A125099 A125100 A125101
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KEYWORD
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base,easy,nonn
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AUTHOR
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Franklin T. Adams-Watters (FrankTAW(AT)Netscape.net), Nov 20 2006
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