OFFSET
1,1
LINKS
Indranil Ghosh, Table of n, a(n) for n = 1..32769
FORMULA
a(n) ~ n. - Charles R Greathouse IV, Oct 23 2015
EXAMPLE
20 is in the sequence because, 20 = 10100_2 and '10100' has '010' as one of its substrings. - Indranil Ghosh, Feb 11 2017
MATHEMATICA
Select[Range@ 150, Length@ SequencePosition[IntegerDigits[#, 2], {0, 1, 0}] > 0 &] (* Version 10.1, or *)
Select[Range@ 150, MemberQ[Partition[IntegerDigits[#, 2], 3, 1], {0, 1, 0}] &] (* Michael De Vlieger, Feb 11 2017 *)
PROG
(Python)
i=j=0
while j<=100:
if "010" in bin(i)[2:]:
print(str(j)+" "+str(i))
j+=1
i+=1 # Indranil Ghosh, Feb 11 2017
(PARI) is(n)=while(n>9, if(bitand(n, 7)==2, return(1)); n>>=1); 0 \\ Charles R Greathouse IV, Feb 11 2017
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
EXTENSIONS
Offset corrected by Charles R Greathouse IV, Feb 11 2017
STATUS
approved