187245

Appears in sequences

• Base-2 digits of a(n) are, in order, the first n terms of the periodic sequence with initial period 1,0,1.at n=17A033120
• Base 4 digits are, in order, the first n terms of the periodic sequence with initial period 2,3,1.at n=8A037639
• Numbers that are repdigits in base 8.at n=40A048333
• a(n) = a(n-1) + 2^(A007494(n-1)).at n=11A113835
• Numbers whose base 8 or octal representation is 555555555......5.at n=6A125836
• Positive integers that are palindromes (of even length) in binary, each made by concatenating two identical binary palindromes.at n=36A161400
• Numbers having in binary representation exactly two ones in three consecutive digits.at n=31A173593
• Numbers k such that (rol(k) XOR ror(k)) = k, where rol = A006257 and ror = A038572 are rotations of binary digits by one place to the left and right, and XOR is the binary exclusive-or operator.at n=11A273050
• Binary "cubes"; numbers whose binary representation consists of three consecutive identical blocks.at n=44A297405
• (a(n-2) XOR a(n-1)) OR (highest bit of a(n-2))*2 OR 1; a(0)=2, a(1)=3.at n=32A334041