27759

Appears in sequences

• Numbers k such that 10^999 + k is a (titanic) prime.at n=16A074282
• a(n) = Sum_{k=0..n} C(n, k)*C(n+k, k)/(2k-1), where C(n, k) denotes the binomial coefficient n!/(k!*(n-k)!).at n=8A245769
• a(n) = binomial(3*n,n)/(2*n + 1) - 2*binomial(3*(n - 1),n - 1)/(2*n - 1) for n > 0 with a(0) = 1.at n=8A336945