GitHub - matracine/php-binary-string: PHP Library to manipulate binary strings
Convert Binary String to Int in Python (with code)
Find a recurrence relation for $a_n$, the number of binary strings of length $n$, which have 3 consecutive 1's. - Mathematics Stack Exchange
SOLVED: binary string consists of 0's and 1's, while a ternary string consists of 0', 1's, and 2's a) How many binary strings of length n are there? b) How many binary