39005

Appears in sequences

• Numbers k such that k^2 is palindromic in base 14.at n=27A030072
• Denominators of continued fraction convergents to sqrt(50).at n=4A041085
• Denominators of continued fraction convergents to sqrt(200).at n=4A041371
• Denominators of continued fraction convergents to sqrt(450).at n=8A041857
• Denominators of continued fraction convergents to sqrt(800).at n=8A042543
• a(n) = n^4 + 3*n^2 + 1.at n=14A057721
• Numbers generated by the Fibonacci polynomial x^4 + 3x^2 + 1.at n=13A085151
• Spiro-tetranacci numbers: a(n) = sum of four previous terms that are nearest when terms arranged in a spiral.at n=26A092369
• Pell equation solutions (7*b(n))^2 - 2*(5*a(n))^2 = -1 with b(n) = A097732(n), n >= 0. Note that D = 50 = 2*5^2 is not squarefree.at n=2A097733
• Array read by antidiagonals of a(n) = a(n-1)*k-((k-1)/(k^n)) where a(0)=1 and k=(sqrt(x^2+1)+x)^2 for integers x>=1.at n=42A188647
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 467", based on the 5-celled von Neumann neighborhood.at n=38A272320
• Expansion of 1/( Product_{k=0..7} (1 - (8*k+1) * x) )^(1/8).at n=3A383631
• a(0) = 5; a(n) = Pell(5*n)/Pell(n) for n > 0.at n=3A383741
• Square array A(n,k), n>=0, k>=0, read by antidiagonals downwards, where column k is the expansion of g.f. x/(1 - A002203(k)*x + (-1)^k*x^2).at n=41A383742