1,2

The layer sequence is the sequence of the cardinalities of the layers accumulating around a ( finite-sided ) polygon of the tessellation under successive side-reflections; see the illustration accompanying A054888.

G.f.: (1+x)*(x^3-1)*(x^5-1)*(x^7-1)/(x^16-2*x^15+x^12+x^10-x^4-x^6+2*x-1

Sequence in context: A055417 A018918 A077855 this_sequence A019302 A119861 A018075

Adjacent sequences: A054884 A054885 A054886 this_sequence A054888 A054889 A054890

nonn

Paolo Dominici (pl.dm(AT)libero.it), May 23 2000