-1947

Appears in sequences

• a(n) = 3*a(n-1) - 7*a(n-2), with a(0)=0, a(1)=1.at n=10A190961
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 233", based on the 5-celled von Neumann neighborhood.at n=33A270979
• Expansion of Product_{k>=2} (1 - x^k)^k.at n=28A298599