cp's OEIS Frontend

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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A229085 Sequence A229084 written in base 10.

Original entry on oeis.org

6, 1, 12, 2, 3, 5, 56, 4, 26, 23, 9, 11, 13, 7, 264, 50, 78, 18, 22, 53, 120, 51, 10, 55, 25, 27, 14, 15, 96, 16, 24, 40, 28, 36, 44, 52, 30, 8, 20, 106, 21, 108, 182, 58, 31, 33, 17, 101, 19, 105, 43, 45, 47, 49, 103, 174, 252, 123, 61, 4032, 32, 48, 80, 452
Offset: 1

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Author

Jaroslav Krizek, Sep 13 2013

Keywords

Comments

A229084 = lexicographically earliest sequence of distinct positive integers written in base 2 such that the concatenation of the terms equals the concatenation of the positive integers, and no term appears in its natural position. Leading zeros are forbidden.
The positive integers written in base 10 (A000027):
+-+--+--+---+---+---+---+----+----+----+----+----+----+----+
|1| 2| 3| 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 |...
+-+--+--+---+---+---+---+----+----+----+----+----+----+----+
The positive integers written in base 2 (A007088):
+-+--+--+---+---+---+---+----+----+----+----+----+----+----+
|1|10|11|100|101|110|111|1000|1001|1010|1011|1100|1101|1110|...
+-+--+--+---+---+---+---+----+----+----+----+----+----+----+
Sequence A229084:
+----+-+----+--+--+---+------+---+-----+-----+----+----+----+
| 110|1|1100|10|11|101|111000|100|11010|10111|1001|1011|1101|...
+----+-+----+--+--+---+------+---+-----+-----+----+----+----+
This sequence a(n):
+----+-+----+--+--+---+------+---+-----+-----+----+----+----+
| 6 |1| 12 | 2| 3| 5 | 56 | 4 | 26 | 23 | 9 | 11| 13|...
+----+-+----+--+--+---+------+---+-----+-----+----+----+----+

Crossrefs

Cf. A228595 (like sequence in base 10), A007088 (numbers written in base 2), A229084.

Programs

  • Perl
    See Link section.

Extensions

Corrected by Paul Tek, Sep 19 2013
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