109226

Appears in sequences

• a(n) = (5*4^n - 2)/3.at n=8A020989
• Number of 132 and 213-avoiding derangements of {1,2,...,n}.at n=18A061547
• Numbers k such that A081252(m)/m^2 has a local maximum for m = k.at n=16A081254
• a(n) = (5*2^n + (-1)^n - 3)/3.at n=16A084170
• Inverse binomial transform of a math magic problem.at n=17A084214
• a(n) is the smallest number such that the exponent of p=2 factor in 6*a(n)+4 equals n.at n=16A087231
• Triangular array read by rows: T(n,1) = T(n,n) = 1, T(n,k) = 4*T(n-1, k-1) + 2*T(n-1, k).at n=53A119726
• a(n) = 2*a(n-1) + a(n-2) - 2*a(n-3).at n=16A140359
• a(1)=2, a(2)=4, a(3)=6; a(n+3) = a(n+2)+ 2*a(n), n>=1.at n=16A151794
• a(n) = (10*2^n + 2*(-1)^n)/3 for n > 0; a(0) = 1.at n=15A168648
• a(n) = 2^(n-1) - (2^n*(-1)^n + 2)/3.at n=16A176965
• Decimal representation of the n-th iteration of the "Rule 167" elementary cellular automaton starting with a single ON (black) cell.at n=8A267578
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 14", based on the 5-celled von Neumann neighborhood.at n=16A277954
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 302", based on the 5-celled von Neumann neighborhood.at n=16A280839
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 430", based on the 5-celled von Neumann neighborhood.at n=16A282123
• a(n) = 2*A135318(n+1) - A135318(n).at n=33A356050
• Numerator of h(n) which is the minimum among the maxima of period n cycles of T(x) = 1 - 2 * |x-1/2|.at n=16A385706