-4672

Appears in sequences

• Triangle of numbers obtained by inverting infinite matrix defined in A059369, read from right to left.at n=43A059370
• Second diagonal of triangle in A059370.at n=7A059373
• Numerators of the inverse binomial transform of the Leibniz series for Pi/4.at n=5A173296
• Expansion of chi(-q) * chi(q^9) / (chi(q) * chi(-q^9)) in powers of q where chi() is a Ramanujan theta function.at n=35A260215
• Expansion of (phi(q) / phi(q^3))^2 in powers of q where phi() is a Ramanujan theta function.at n=35A261321
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 195", based on the 5-celled von Neumann neighborhood.at n=39A270692
• Start the sequence with a(1) = 3. From now on iterate: if |a(n)| is prime, subtract from a(n) the |a(n)|-th prime of the list of primes A000040 and if |a(n)| is nonprime, add to a(n) the |a(n)|-th nonprime of the list of nonprimes A018252.at n=12A374834