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A136441 Number of rotational symmetries in the binary expansion of a number with 0 appended to the front. 2
2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 3, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Gary Doran, Table of n, a(n) for n = 0..100

EXAMPLE

a(0) = 2 because 00 has two rotational symmetries; a(21) = 3 because 010101 has 3 rotational symmetries.

CROSSREFS

Cf. A138904.

Sequence in context: A025450 A139128 A106752 * A030561 A202053 A249545

Adjacent sequences:  A136438 A136439 A136440 * A136442 A136443 A136444

KEYWORD

base,easy,nonn

AUTHOR

Max Sills, Apr 03 2008

STATUS

approved

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Last modified December 12 17:33 EST 2019. Contains 329960 sequences. (Running on oeis4.)