19556

Appears in sequences

• a(n) = 3^n - (3*n^2 + n + 2)/2.at n=9A061983
• Number of primes in range [2^n+1, 2^(n+1)] whose binary expansion begins '10' (A080165).at n=18A095765
• a(1) = 1; for n>1, a(n) = smallest number which is not a sum or product or power of any subset of the numbers a(1) to a(n-1).at n=17A126326
• Least k such that f(k) < 0, where f(1) = n and f(k) = f(k-1)*e^(1/k) - 1 for k > 1.at n=14A333342