-2347

Appears in sequences

• G.f.: A(x) = 1+x*(1+x*(1+x*(...(1+x*(...)^(-2^n) )...)^-4)^-2)^-1.at n=6A121588
• a(n) = 8*n^3 - 449*n^2 + 7967*n - 45523.at n=24A253045
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 491", based on the 5-celled von Neumann neighborhood.at n=35A272542
• a(1) = 1; a(n) = -Sum_{k=2..n} k^2 * a(floor(n/k)).at n=46A360390
• a(1) = 1; a(n) = -Sum_{k=2..n} k^2 * a(floor(n/k)).at n=47A360390
• a(1) = 1; a(n) = -Sum_{k=2..n} k^2 * a(floor(n/k)).at n=48A360390
• a(1) = 1; a(n) = -Sum_{k=2..n} k^2 * a(floor(n/k)).at n=49A360390