--Solve the functional equation f' o f = id by ansatz: --assume f(x) = ax ^ b. Then --f' o f (x) = ba^b * x ^ ( b ( b-1 ) ) local phi = 1 + math.sqrt( 5 ) / 2 local ihp = 1 - math.sqrt( 5 ) / 2 local function SeriesCoefficients( ) local a, b = math.pow( phi, ihp ), phi local c, d = a, b for i = 1, 100 do --print( c, d ) c = c * d d = d - 1 end end SeriesCoefficients()