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A171084
A "run" means a maximal string of decreasing numbers; this sequence has the property that the sequence of run lengths is the sequence itself and all natural numbers appear exactly once.
2
2, 1, 3, 6, 5, 4, 12, 11, 10, 9, 8, 7, 17, 16, 15, 14, 13, 21, 20, 19, 18, 33, 32, 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 44, 43, 42, 41, 40, 39, 38, 37, 36, 35, 34, 54, 53, 52, 51, 50, 49, 48, 47, 46, 45, 63, 62, 61, 60, 59, 58, 57, 56, 55, 71, 70, 69, 68
OFFSET
1,1
LINKS
Eric Angelini, Runs
E. Angelini, Runs [Cached copy, with permission]
EXAMPLE
Here is the same sequence with stars demarking the runs: 2, 1, * 3, * 6, 5, 4, * 12, 11, 10, 9, 8, 7, * 17, 16, 15, 14, 13, * 21, 20, 19, 18, * 33, 32, 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, * 44, 43, 42, 41, 40, 39, 38, 37, 36, 35, 34, * 54, 53, 52, 51, 50, 49, 48, 47, 46, 45, * 63, ...
CROSSREFS
Sequence in context: A120576 A063707 A205840 * A332318 A118287 A024930
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Sep 07 2010, based on a posting to the Sequence Fans Mailing List by Eric Angelini, Aug 23 2010.
EXTENSIONS
a(55)-a(67) from Lars Blomberg, Nov 23 2013
STATUS
approved