54408

Appears in sequences

• 1/3 the number of n X n 0..2 symmetric matrices with every element equal to zero, one or four horizontal and vertical neighbors.at n=4A211045
• Row sums of triangle A245618.at n=21A245619
• Expansion of (theta_3(z)*theta_3(23z) + theta_2(z)*theta_2(23z))^6.at n=17A328094
• Expansion of g^3/(1 + x*g)^2, where g = 1+x*g^2 is the g.f. of A000108.at n=10A389115