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A080905 Sequence of run lengths in first differences of A080900. 2
4, 1, 4, 1, 4, 1, 2, 1, 1, 1, 2, 1, 4, 1, 4, 1, 2, 1, 1, 1, 2, 1, 4, 1, 4, 1, 2, 1, 1, 1, 2, 1, 2, 1, 1, 2, 1, 1, 2, 1, 2, 1, 1, 1, 2, 1, 4, 1, 4, 1, 2, 1, 1, 1, 2, 1, 4, 1, 4, 1, 2, 1, 1, 1, 2, 1, 2, 1, 1, 2, 1, 1, 2, 1, 2, 1, 1, 1, 2, 1, 4, 1, 4, 1, 2, 1, 1, 1, 2, 1, 4, 1, 4, 1, 2, 1, 1, 1, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Even after 400000 terms there is no clear pattern here.

LINKS

Table of n, a(n) for n=1..99.

EXAMPLE

A080900 begins 1, 6, 11, 16, 21, 19, 24, 29, 34, 39, 37, 42, 47, 52, 57, 55, 60, 65, ..., the differences are 5, 5, 5, 5, -2, 5, 5, 5, 5, -2, ... with runs of lengths 4, 1, 4, 1, ...

CROSSREFS

Cf. A080900, A080922, A080927.

Sequence in context: A030748 A144865 A096622 * A010685 A174571 A099301

Adjacent sequences:  A080902 A080903 A080904 * A080906 A080907 A080908

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Apr 01 2003

STATUS

approved

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Last modified August 21 21:36 EDT 2017. Contains 290908 sequences.