  The nonlinear nonlocal Michelson-Sivashinsky equation for isolated crests of
unstable flames is studied, using pole-decompositions as starting point.
Polynomials encoding the numerically computed 2N flame-slope poles, and
auxiliary ones, are found to closely follow a Meixner Pollaczek recurrence;
accurate steady crest shapes ensue for N>=3. Squeezed crests ruled by a
discretized Burgers equation involve the same polynomials. Such explicit
approximate shape still lack for finite-N pole-decomposed periodic flames,
despite another empirical recurrence.
