1809360

Appears in sequences

• Number of ways of n-coloring the square grid graph G_(3,3) such that no rectangle exists having all 4 corners of the same color.at n=5A252779
• Number of labeled connected non-planar projective-planar K{3,3}-free graphs with n vertices.at n=3A264065
• Expansion of e.g.f. Product_{k>0} 1/(1 - k! * x^k)^(1/k!).at n=8A356542
• Number of inefficient arrangements in A373182, where inefficient means that the maximum number of persons that a seating arrangement can hold is not achieved.at n=16A373829