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A209863 a(n) = Number of fixed points of permutation A209861/A209862 in range [2^(n-1),(2^n)-1]. 9
1, 1, 2, 4, 6, 6, 6, 8, 8, 8, 12, 8, 10, 8, 10, 6, 6, 10, 8, 6, 6, 10, 8, 8, 6 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

See the conjecture given in A209860. If true, then all the terms from a(2) onward are even. a(0) gives the number of fixed points in range [0,0], i.e. 1.

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..24

CROSSREFS

A209860, A209864, A209865, A209866, A209867.

Sequence in context: A225369 A296511 A050823 * A207540 A050825 A174342

Adjacent sequences:  A209860 A209861 A209862 * A209864 A209865 A209866

KEYWORD

nonn

AUTHOR

Antti Karttunen, Mar 24 2012

STATUS

approved

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Last modified July 25 02:42 EDT 2021. Contains 346282 sequences. (Running on oeis4.)