261421

Appears in sequences

• Gaps of 6 in sequence A038593 (upper terms).at n=22A038652
• a(n) = ceiling((2^n + 1 - 2*floor(2^(n/2)))/2).at n=18A129757
• 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 283", based on the 5-celled von Neumann neighborhood.at n=17A280529