1789569706

Appears in sequences

• a(n) = (5*4^n - 2)/3.at n=15A020989
• Number of 132 and 213-avoiding derangements of {1,2,...,n}.at n=32A061547
• Positions of check bits in code in A075967.at n=5A075969
• Numbers k such that A081252(m)/m^2 has a local maximum for m = k.at n=30A081254
• a(n) = (5*2^n + (-1)^n - 3)/3.at n=30A084170
• Inverse binomial transform of a math magic problem.at n=31A084214
• a(n) is the smallest number such that the exponent of p=2 factor in 6*a(n)+4 equals n.at n=30A087231
• a(n) = 2*a(n-1) + a(n-2) - 2*a(n-3).at n=30A140359
• a(1)=2, a(2)=4, a(3)=6; a(n+3) = a(n+2)+ 2*a(n), n>=1.at n=30A151794
• a(n) = (10*2^n + 2*(-1)^n)/3 for n > 0; a(0) = 1.at n=29A168648
• a(n) = 2^(n-1) - (2^n*(-1)^n + 2)/3.at n=30A176965
• 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=30A277954
• 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=30A282123