2754990144

Appears in sequences

• An intermediate sequence for nonisomorphic circulant undirected p^2-graphs, indexed by odd primes p.at n=11A038784
• a(n) = 64*9^(n-2), a(0)=1, a(1)=7.at n=10A055995
• a(n) = n^2*9^n.at n=8A128788
• a(n) = (n/4)*3^(n/2)*((1+sqrt(3))^2+(-1)^n*(1-sqrt(3))^2).at n=32A187273
• a(n) = w(n+1)/(4*w(n)), where w = A203424.at n=7A203425
• Expansion of (1+3*x)^2/(1-3*x)^2.at n=16A236967
• Number of (n+2) X (1+2) 0..1 arrays with no 3 x 3 subblock diagonal sum equal to the antidiagonal sum or central row sum equal to the central column sum.at n=15A258918
• Powers k^m, m > 1, where k is an Achilles number that has a primorial kernel but is not a product of primorials.at n=24A389374