28184576

Appears in sequences

• a(n) = Sum_{k >= 0} 2^k * binomial(k+2,n-2*k).at n=30A061279
• a(n) = 4*a(n-1) - 4*a(n-2) + 4*a(n-3) with a(0) = 1, a(1) = 3, a(2) = 10.at n=15A247595
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 197", based on the 5-celled von Neumann neighborhood.at n=24A279755