296524800

Appears in sequences

• Number of defective (binary) heaps on n elements with exactly one defect.at n=14A323957
• Expansion of e.g.f. 1 / ( 1 - Sum_{k>=0} x^(4*k+3) / (4*k+3) ).at n=13A365981
• a(n) = denominator(Sum_{k=1..n} k^2/k!).at n=14A371832