-5197

Appears in sequences

• a(n) = a(n-1) - 2*a(n-2) with a(0) = 2, a(1) = 1.at n=23A002249
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 147", based on the 5-celled von Neumann neighborhood.at n=37A270293
• Triangle of numerators for rational convergents to Taylor series of Gamma(x+1).at n=16A386678