42565

Appears in sequences

• Generalized Pellian with second term equal to 7.at n=11A048694
• Bisection (odd part) of Chebyshev sequence with Diophantine property.at n=5A077239
• Combined Diophantine Chebyshev sequences A077240 and A077239.at n=11A077242
• a(n) = 13 + floor(Sum_{j=1..n-1} a(j)/2).at n=20A120140
• Positive numbers y such that y^2 is of the form x^2+(x+601)^2 with integer x.at n=9A160098
• a(n) = ((5+sqrt(5))*(4+sqrt(5))^n + (5-sqrt(5))*(4-sqrt(5))^n)/10.at n=6A163073
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 161", based on the 5-celled von Neumann neighborhood.at n=41A270452
• Array read by ascending antidiagonals: A(n, k) = n! * [x^n] exp((k-1)*x)*(k*cosh(sqrt(k)*x) + sqrt(k)*sinh(sqrt(k)*x))/k, with 1 <= k <= n.at n=49A366858