JOURNAL OF ENGINEERING SCIENCE, cilt.30, sa.4, ss.111-123, 2024 (Hakemli Dergi)
By using Sulanke-Xin continued fractions method, Xin proposed a recursion system to solve the Somos 4 Hankel determinant conjecture. We find Xin's recursion system indeed give a sufficient condition for $(\alpha, \beta)$ Somos $4$ sequences. This allows us to prove 4 conjectures of Barry on $(\alpha, \beta)$ Somos $4$ sequences in a unified way.