The sequence is squares of consecutive odd numbers: 1^2=1, 3^2=9, 5^2=25, 7^2=49, 9^2=121, 11^2=121, 13^2=169. Wait, that's inconsistent. Let me reconsider: 1^2, 3^2, 5^2, 7^2, then 9^2=81, not 121. But 121 = 11^2. The pattern seems to be odd squares skipping some: 1, 9, 25, 49, 121, 169 which are 1^2, 3^2, 5^2, 7^2, 11^2, 13^2. Option B (121) fits.