53687090

Appears in sequences

• G.f.: (4*x^2 + 2*x)/(4*x^3 - x^2 - 4*x + 1).at n=13A115243
• a(n) = floor(A140657(n+2)/10).at n=27A140659
• Least prime p such that q = (3+p)/2^n is prime.at n=28A248526