138100domain: NAppears in sequencesExpansion of (1-x)/(1 - x - x^3 - 2*x^4 + 2*x^5).at n=29A052914Number of polygons formed when every pair of vertices of a row of n adjacent congruent rectangles are joined by an infinite line.at n=25A344993Number of strong (=generic) guillotine rectangulations with n rectangles.at n=8A375913