  The main object of study in this paper is the well-known Somos-4 recurrence.
We prove a theorem that any sequence generated by this equation also satisfies
Gale-Robinson one. The corresponding identity is written in terms of its
companion elliptic sequence. An example of such relationship is provided by the
second-order linear sequence which, as we prove using Wajda's identity,
satisfies the Somos-4 recurrence with suitable coefficients. Also, we construct
a class of solutions to Volterra lattice equation closely related to the
second-order linear sequence.
