A122530 Decreasing runs. The size of each run is given by the sequence itself. First run starts with "1", second with "2", third with "3", fourth with "4", etc.

1, 2, 1, 3, 4, 3, 2, 5, 4, 3, 2, 6, 5, 4, 7, 6, 8, 7, 6, 5, 4, 9, 8, 7, 6, 10, 9, 8, 11, 10, 12, 11, 10, 9, 8, 7, 13, 12, 11, 10, 9, 14, 13, 12, 11, 15, 14, 13, 12, 11, 10, 9, 16, 15, 14, 13, 12, 11, 17, 16, 15, 14, 13, 12, 11, 10, 18, 17, 16, 15, 14, 13, 12, 19, 18, 17, 16, 15, 14, 20

Offset

1,2

Comments

Terms computed by Gilles Sadowski

Links

Table of n, a(n) for n=1..80.

Example

S is the sequence and R is the size of each run:
S=1,2,1,3,4,3,2,5,4,3,2,6,5,4,7,6,8,7,6,5,4,9,8,7,6,10,9,8,11,10...
S=1,(2,1),(3),(4,3,2),(5,4,3,2),(6,5,4),(7,6),(8,7,6,5,4)...
R=1 2 1 3 4 3 2 5... = sequence S

Crossrefs

Sequence in context: A237124 A233547 A358193 * A301453 A278340 A324749

Adjacent sequences: A122527 A122528 A122529 * A122531 A122532 A122533

Keyword

base,easy,nonn

Author

Eric Angelini, Sep 17 2006

Status

approved