2080136522

Appears in sequences

• a(0) = -1, a(1) = 2; a(n) = 2*a(n-1) + a(n-2).at n=25A078343
• Integers k such that 2*k^2 - 7 is a square.at n=24A217975
• a(n) = 6*a(n - 1) - a(n - 2) with a(0) = 2, a(1) = 8.at n=12A266507