product_barcode_generator/sequence_view.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>
        
        <record id="sequence_add_barcode_sequence_view" model="ir.ui.view">
            <field name="name">ir.sequence.form</field>
            <field name="model">ir.sequence</field>
            <field name="inherit_id" ref="base.sequence_view"/>
            <field name="arch" type="xml">
                <field name="implementation" position="after">
                    <field name="barcode_sequence"/>
                </field>
            </field>
        </record>
        
    </data>
</openerp>