-3055

Appears in sequences

• Expansion of (1-x)/(1-x+x^2+x^3).at n=30A078016
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 283", based on the 5-celled von Neumann neighborhood.at n=29A271120
• a(n) = -(A(n) - A(n-1)) where A(n) = A057597(n+1), for n >= 0.at n=29A319200
• Expansion of g.f. A(x) satisfying Sum_{n>=0} Product_{k=1..n} (x^k + 4*A(x)) = 1 + 5*Sum_{n>=1} x^(n*(n+1)/2).at n=5A370144
• a(n) is the numerator of the imaginary part of Product_{k=1..n} (1/k + i) where i is the imaginary unit.at n=8A370549
• a(n) is the numerator of the real part of Product_{k=1..n} (1 + i/k) where i is the imaginary unit.at n=8A370551