131989

Appears in sequences

• a(n) is the least odd number m minimizing A007947(m*(2^n-m)).at n=25A143700
• a(n) = (a(n-1)+1)*(a(n-3)+1)/a(n-4) for n > 3, a(0) = a(1) = a(2) = a(3) = 1.at n=13A276308