

A262281


a(n) = smallest nonnegative number, not a power of 2, that is not a substring of n in its binary representation.


3



3, 0, 3, 0, 3, 3, 5, 0, 3, 3, 3, 6, 5, 7, 5, 0, 3, 3, 3, 5, 3, 3, 7, 6, 5, 5, 7, 7, 5, 9, 5, 0, 3, 3, 3, 5, 3, 3, 5, 5, 3, 3, 3, 6, 7, 7, 9, 6, 5, 5, 5, 5, 7, 7, 7, 9, 5, 5, 9, 9, 5, 9, 5, 0, 3, 3, 3, 5, 3, 3, 5, 5, 3, 3, 3, 6, 5, 7, 5, 5, 3, 3, 3, 6, 3, 3, 7
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OFFSET

0,1


COMMENTS

Similar to A261922, but if the smallest missing number is a power of 2, ignore it and look at the nextsmallest missing number.
This is like applying A261922 not to n itself but to n plus a very large power of 2. Suggested by considering A261416.


LINKS

Hiroaki Yamanouchi, Table of n, a(n) for n = 0..10000


EXAMPLE

For n = 13 = 1101_2, we can see 0, 11 (3), 101 (5), 110 (6), but not 111 (7), so a(13)=7.


CROSSREFS

Cf. A261416, A261461, A261922.
See A262289 for the "positive" version.
Sequence in context: A141030 A221168 A194084 * A297871 A292130 A291971
Adjacent sequences: A262278 A262279 A262280 * A262282 A262283 A262284


KEYWORD

nonn,base


AUTHOR

N. J. A. Sloane, Sep 17 2015


EXTENSIONS

a(23)a(86) from Hiroaki Yamanouchi, Sep 20 2015


STATUS

approved



