2508800

Appears in sequences

• a(1) = 2, a(2) = -32; a(n) = -16*a(n - 1) + 12*add(binomial(2*n - 2, 2*i)*a(i)*a(n - 1 - i), i = 1 .. n - 2).at n=4A069182
• a(n) = the numerator of b(n): {b(n)} is such that the continued fraction (of rational terms) [b(1);b(2),...,b(n)] equals the n-th prime, for every positive integer n.at n=41A128270
• Numbers m such that sigma(2*m-1) = 3*m, where sigma(k) is the sum of the positive divisors of k.at n=7A190786