130728

Appears in sequences

• a(n) = ((2 + 3*sqrt(2))^n - (2 - 3*sqrt(2))^n)/(2*sqrt(2)).at n=7A124191
• Theta series of direct sum of 2 copies of 4-dimensional lattice QQF.4.i.at n=27A212817
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 601", based on the 5-celled von Neumann neighborhood.at n=16A289774