2492174

Appears in sequences

• a(n) = 5*a(n-1) - a(n-2), with a(0) = 1 and a(1) = 2.at n=10A002310
• a(n) = 5*a(n-3) - a(n-6) with terms 1..6 as 0, 1, 2, 5, 7, 9.at n=29A142879
• a(n) = (a(n-1)*a(n-3) + 1) / a(n-4) with a(0) = a(1) = a(2) = a(3) = 1.at n=31A217787
• Values of x in the solutions to x^2 - 5xy + y^2 + 5 = 0, where 0 < x < y.at n=19A237254
• Number of nX7 0..1 arrays with every element unequal to 0, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=13A317814