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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A120631 Decimal equivalent of A066329.

Original entry on oeis.org

0, 1, 3, 4, 5, 8, 9, 11, 12, 13, 15, -1, -1, -1, -1, -1, 16, 17, 19, 20, 21, 24, 25, 27, 28, 29, 31, -1, -1, -1, -1, -1, 32, 33, 35, 36, 37, 40, 41, 43, 44, 45, 47, -1, -1, -1, -1, -1, 48, 49, 51, 52, 53, 56, 57, 59, 60, 61, 63, -1, -1, -1, -1, -1, 64, 65, 67, 68, 69, 72, 73, 75, 76, 77, 79, -1, -1, -1, -1, -1, 80, 81, 83, 84, 85, 88, 89
Offset: 0

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Author

Joshua Zucker, Jun 21 2006

Keywords

Comments

There is some ambiguity here: Should 1 be made as 10 or 01? Should 5 be made as 1000 or 0111? The terms here choose 01 and 1000 respectively. The original author did not give a term for 10, so I do not know if 1111 should be considered a valid string (using both 5s) or not. I assumed it was valid in extending the sequence.

Crossrefs

Cf. A066329 for the binary version and a fuller description of this sequence.
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