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A074278 Positions in the Kolakoski sequence A000002 when there are a multiple of 3 1's and the current term is 1. 2
5, 13, 17, 23, 29, 34, 41, 48, 52, 59, 67, 71, 78, 85, 91, 97, 103, 109, 115, 121, 125, 131, 137, 143, 149, 157, 161, 168, 175, 179, 185, 191, 196, 202, 209, 217, 221, 227, 233, 239, 245, 251, 256, 263, 268, 274, 280, 286, 292, 298, 304, 311, 319, 323, 329 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
n such that A000002(n) = 1 and A000002(m) = 1 for 3k indices m <= n, for some natural number k.
LINKS
EXAMPLE
The Kolakoski sequence begins 1,2,2,1,1,2,1,2,2,1,2,2,1,1,2,... At position 5 and position 13, there are 3 and 6 1's, so 5 and 13 are in this sequence.
CROSSREFS
Cf. A074273.
Sequence in context: A249034 A208883 A182078 * A087895 A092101 A105596
KEYWORD
nonn,easy
AUTHOR
Jon Perry, Sep 21 2002
EXTENSIONS
Extended and edited by Nathaniel Johnston, May 02 2011
STATUS
approved

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Last modified June 23 08:04 EDT 2024. Contains 373629 sequences. (Running on oeis4.)