274337280

Appears in sequences

• Number of permutations divided by the number of (binary) heaps on n elements.at n=24A132862
• Expansion of e.g.f. A(x,y) satisfying A(x,y) = 1 + x*A(x,y) * exp(x*y * A(x,y)), as a triangle read by rows.at n=48A366230