Number of lambda calculus terms of size n, where size(lambda x.M) = 2 + size(M), size(M N) = 2 + size(M) + size(N), and size(V) = 1 + i for a variable V bound by the i-th enclosing lambda (corresponding to a binary encoding).

A114851

Number of lambda calculus terms of size n, where size(lambda x.M) = 2 + size(M), size(M N) = 2 + size(M) + size(N), and size(V) = 1 + i for a variable V bound by the i-th enclosing lambda (corresponding to a binary encoding).