1497965

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=20A033120
• a(n) = a(n-1) + 2^(A007494(n-1)).at n=13A113835
• Numbers whose base 8 or octal representation is 555555555......5.at n=7A125836
• Numbers having in binary representation exactly two ones in three consecutive digits.at n=37A173593
• 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=13A273050
• (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=38A334041