Computed: YHVH = 10+5+6+5 = 26. Counted: the generations from Adam to Moses are twenty-six.
Meaning
Twenty-six is the value of the Tetragrammaton and therefore the number the tradition treats as the name's own; a bare '26' in a Kabbalistic text is usually the name written discreetly. The same 26 is the count of generations from Adam to Moses — the world stood twenty-six generations before the Torah was given — and the two are read together as the name sustaining the generations that did not yet know it.