-1699

Appears in sequences

• Coefficients in 1/(1+P(x)), where P(x) is the generating function of the primes.at n=21A030018
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 305", based on the 5-celled von Neumann neighborhood.at n=23A271163