75098

Appears in sequences

• Number of (3412,1234)-avoiding involutions in S_n.at n=43A085583
• Number of parts of even multiplicities in all the partitions of n.at n=42A264400
• Consider the figure made up of a row of n adjacent congruent rectangles, with diagonals of all possible rectangles drawn; a(n) = number of interior vertices where exactly two lines cross.at n=28A334701