1048386

Appears in sequences

• a(n) = 2^n - n*(n-1)/2.at n=20A014844
• Leading diagonal of triangle in A080521.at n=19A080522
• 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 229", based on the 5-celled von Neumann neighborhood.at n=19A279994