-1868

Appears in sequences

• Coefficients of the minimal polynomials of the algebraic numbers sqLhat(2*l) from A230072, l >= 1, related to the square of all length in a regular (2*l)-gon inscribed in a circle of radius 1 length unit.at n=42A230073
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 251", based on the 5-celled von Neumann neighborhood.at n=27A271019
• A Seidel matrix A(n,k) read by antidiagonals downwards.at n=38A323834
• A Seidel matrix A(n,k) read by antidiagonals downwards.at n=42A323834