125492

Appears in sequences

• Pisot sequences E(5,7), P(5,7).at n=27A020711
• Pisot sequences E(7,10), P(7,10).at n=26A020721
• a(n) = floor(sqrt(a(n-1)^2 + a(n-2)^2 + a(n-1)*a(n-2))), a(1)=1, a(2)=3.at n=30A128424