257302

Appears in sequences

• Even pseudoprimes to base 19.at n=4A130437
• Irregular table: the n-th row polynomial is given by the formal power series expansion of Sum_{k >= 0} (1 + q)^(n*k + n^2)*Product_{j = 1..k} (1 - (1 + q)^(2*j-1)), n >= 1.at n=50A340882