33039

Appears in sequences

• Numbers k such that sigma(k-3) + sigma(k+3) = sigma(2*k).at n=28A067129
• Real parts of binomial transform of the Gaussian primes.at n=13A106463
• a(0) = 0; for n >= 1, a(n) = -(3/2)*(a(n-1)+A355905(n-1)).at n=25A355906