

A176237


Binary expansion of n contains at least one 1bit at even position and one 1bit at odd position.


0



3, 6, 7, 9, 11, 12, 13, 14, 15, 18, 19, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 33, 35, 36, 37, 38, 39, 41, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 66, 67, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 82, 83, 86, 87, 88, 89, 90, 91, 92, 93
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OFFSET

1,1


COMMENTS

Also numbers neither in A000695 nor in A062880.


LINKS

Table of n, a(n) for n=1..71.


EXAMPLE

The binary expansion of 6 is "110", and has one 1bit at (odd) position 1 and one 1bit at (even) position 2; thus 6 appears in the sequence.


MATHEMATICA

ok[n_] := With[{p = Position[IntegerDigits[n, 2], 1]}, AnyTrue[p, OddQ[#[[1]]]&] && AnyTrue[p, EvenQ[#[[1]]]&]]; Select[Range[100], ok] (* JeanFrançois Alcover, Mar 31 2017 *)


CROSSREFS

Cf. A000695, A062880.
Sequence in context: A071530 A005767 A085837 * A187811 A324696 A186348
Adjacent sequences: A176234 A176235 A176236 * A176238 A176239 A176240


KEYWORD

easy,nonn


AUTHOR

Rémy Sigrist, Apr 12 2010


STATUS

approved



