A025575 a(n) = T(n,[ n/2 ]), where T is the array defined in A025564.
1, 1, 2, 3, 8, 13, 40, 65, 211, 343, 1148, 1866, 6369, 10351, 35816, 58201, 203424, 330525, 1164228, 1891454, 6703372, 10889622, 38785840, 63002765, 225325940, 365989685, 1313494396, 2133343150, 7679038865, 12471457095, 45006411960, 73091197335
Offset: 1