50373

Appears in sequences

• Numbers k such that the k-th Fibonacci number reversed is prime.at n=29A036971
• Numbers n such that Lucas(prime(n)) is prime, where Lucas = A000032.at n=53A120561
• Number of non-isomorphic connected set-systems of weight n.at n=14A300913
• G.f. A(x) satisfies A(x) = 1 / ((1 + x) * (1 - x * A(x^3))).at n=49A367693
• k such that 0 = Sum_{j=1..k} A373223(k, j). The indices of the rows in Gauss's triangle with vanishing row sums.at n=18A373181