a(0)=0; for n >= 1, a(n) is the least positive integer that cannot be written in the form Sum_{k>=1} s(k)*k!, with s(k) in {a(0), a(1), ..., a(n-1)}.

A141447

a(0)=0; for n >= 1, a(n) is the least positive integer that cannot be written in the form Sum_{k>=1} s(k)*k!, with s(k) in {a(0), a(1), ..., a(n-1)}.