Is it possible to solve $\frac{dy}{dx}=y^x$?

Unable to proceed analytically I used numerical integration after logarithmic differentiation.

Take logs and differentiate $$ \log y' = x \log y,\; \dfrac{y^{''}}{y'}= \log y + \dfrac{x y{'}}{y}$$

The ode is (primes differentiation with respect to $x$ )

$$ \dfrac{d^2y}{dx^2}= y'\;\big[ \log \;y + \dfrac{xy^{'}}{y} \big] $$

with BC for two curves: $( x=0, y'=1, y_i= (5,9,18,25)\;) $

The Boundary condition $ x=0, y'=1 $ for all $y_i$ compels adoption of ode to be of next higher order i.e., second order.

Curve terminates at $y_{max}$ due to log singularity.

$y>0$ always. Negative $x-$ axis exists, but not computed /plotted.

EDIT1:

Integrand replotted after minor error (of no concern here). The computation errors are checked and seen to plot to zero (brown line plot) residue using second order ode.

EDIT2:

This morning even after diligent checks on same program could find no error so far but surprisingly got slightly different $y$ values. I am reporting the same along with the code and the previous graph for anyone to take a look even if qualitatively and checking-wise nothing has really changed.

NDSolve[{Y''[x]==Y[x]^x*(Log[Y[x]]+x 
Y[x]^x/Y[x]),Y[0]==5,Y'[0]==1},Y,{x,0,1.715028}];
y[u_]=Y[u]/.First[%];
Res[u_]:=y'[u]-y[u]^u;
g5=Plot[{y[x],Res[x]},{x,0,1.715027}]
FindRoot[y[xu]==20.,{xu,1.3}]

The four curves have BC: $$ (y_i,x_{max})=\big[(5,1.715028),(9,1.66261),(18,1.609705),(25,1.58755)\big]$$

EDIT3:

The matter of Output Difference is not acceptable. So it has been posed at the StackExchange Mathematica site with link to this problem in this site ...analysis on-going.