-2672

Appears in sequences

• Coefficients of expansion of:p(t,y)=-Exp[t/4]/(-2 + y*Exp[t/4] + y*Exp[3*t/4]).at n=15A171770
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 51", based on the 5-celled von Neumann neighborhood.at n=27A270021