|
|
A107911
|
|
Numbers having consecutive zeros and also consecutive ones in binary representation.
|
|
1
|
|
|
12, 19, 24, 25, 28, 35, 38, 39, 44, 48, 49, 50, 51, 52, 56, 57, 60, 67, 70, 71, 75, 76, 77, 78, 79, 83, 88, 89, 92, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 108, 112, 113, 114, 115, 116, 120, 121, 124, 131, 134, 135, 139, 140, 141, 142, 143, 147, 150, 151, 152
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
MATHEMATICA
|
czcoQ[n_]:=Module[{c2=Partition[IntegerDigits[n, 2], 2, 1]}, MemberQ[c2, {0, 0}]&&MemberQ[c2, {1, 1}]]; Select[Range[200], czcoQ] (* Harvey P. Dale, Jul 24 2012 *)
|
|
PROG
|
(Python)
def ok(n): b = bin(n)[2:]; return "00" in b and "11" in b
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|