Orthogonal Transmission

A series of radio frequencies are transmitted as integers. Two adjacent frequencies are 'orthogonal' if they share no common set bits (i.e., their bitwise AND is zero). Given a sequence of N frequencies, find the length of the longest contiguous sub-sequence where every pair of adjacent frequencies is orthogonal. Example: Input: 5 5 2 8 4 10 Output: 4 Explanation: Pairs: (5,2) AND=0, (2,8) AND=0, (8,4) AND=0, (4,10) AND=0. All 4 pairs are orthogonal, but (4,10) is 0100 & 1010 = 0. Wait, 4 (0100) and 10 (1010) share no bits. The whole sequence of 5 might be orthogonal? Let's check: 5&2=0, 2&8=0, 8&4=0, 4&10=0. Length is 5. If the last was 12 (1100), 4&12=4, sequence would break.