number of binary trees of height equal to or less than n

[Jonathan Post]

While looking for the simplest tree enumeration interpretation of  A126604,
by comparison with the somewhat related A003095, I was surprised that OEIS
does not have:

a(n) = partial sum of A003095 = number of binary trees of height equal to or
less than n.
0, 1, 3, 8, 34, 711, 459041, ...

Or have I made a stupid error of arithmetic or look-up?
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