116506

Appears in sequences

• Triangle read by rows, where t(n,1) = 1, t(n,m) = t(n,m-1) + (largest nonprime {1 or composite} in row {n-1}).at n=54A120853
• Number of permutation symbols of type a(n) for hyperbolic archimedean tessellations of rank n.at n=17A142866
• A bisection of A142866.at n=8A142873
• G.f.: (1-x)*(1-2*x-x^2-(1-x)*sqrt(1-2*x-3*x^2))/(2*x*(1-2*x-x^2)).at n=13A257596