39342

Appears in sequences

• a(n) = a(n-1) + a(m) for n >= 4, where m = 2*n - 2 - 2^(p+1) and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = 1, a(2) = 2, and a(3) = 3.at n=37A050051
• Numbers k such that both k and k^2/2 are averages of twin prime pairs.at n=28A152787
• Define k(0) = 2 and k(m) = m^2-k(m-1) for m >= 1. This is a list of those terms k(m) for which k(m)+1 and k(m)-1 are both in A008578 (primes including 1).at n=8A154734
• Expansion of 2/((1 - x)*(3 - theta_3(x))), where theta_3() is the Jacobi theta function.at n=29A303667