1663936

Appears in sequences

• Expansion of g.f. 1/((1-4*x)*(1-10*x)).at n=6A016157
• Number of permutations of length n that avoid the patterns 4123, 4231, and 4312.at n=12A257562
• a(n) = p(1,n), where p(x,n) is the strong divisibility sequence of polynomials based on sqrt(5) as in A327322.at n=6A329012