181165

Appears in sequences

• Generalized Pellian with second term equal to 5.at n=13A048655
• Numbers k such that (k^2 - 7)/2 is a square.at n=13A077443
• Expansion of g.f.: (5 - 3*x)/(1 - 6*x + x^2).at n=6A101386
• Shifted Pell recurrence: a(n) = 2*a(n-2) + a(n-4).at n=26A135246
• a(n) = 2*a(n - 2) + a(n - 4) with a(0) = -1, a(1) = 1, a(2) = 3, a(3) = 5.at n=27A266505