84987760

Appears in sequences

• Number of diagonal dissections of a convex n-gon into n-5 regions.at n=10A002056
• Define a sequence of rationals by f(0)=0, thereafter f(n)=f(n-1)-1/n if that is >= 0, otherwise f(n)=f(n-1)+1/n; a(n) = denominator of f(n).at n=24A231693
• E.g.f.: Product_{k>=1} (1 + x^(k*(k + 1)/2) / (k*(k + 1)/2)!).at n=26A334385