81462

Appears in sequences

• Expansion of Product_{k>=0} ((1+x^(2*k+1))/(1-x^(2*k+1)))^3.at n=16A261647
• The number of tilings of an equilateral triangle of side length n with k lozenges and n^2 - 2*k unit triangles. Triangle T(n, k) with n >= 1 and 0 <= k <= n*(n + 1)/2, read by rows.at n=40A273464
• a(n) = Sum_{k=0..floor(n/2)} (k+1) * binomial(k,3*(n-2*k)).at n=32A392254