139657

Appears in sequences

• a(n) is the unique odd positive solution x of 2^n = 7x^2+y^2.at n=34A077020
• a(0)=1, a(1)=1; thereafter a(n) = -a(n-1) - 2*a(n-2).at n=33A169998
• Expansion of (2 + x + x^2 + x^3 - x^4 - 2*x^5 - 4*x^6 - 8*x^7) / (1 - x^4 + 16*x^8) in powers of x.at n=35A247487
• a(n) = 3*a(n-1) - 4*a(n-2) with a(0) = a(1) = 1.at n=17A247560
• a(n) = 3*a(n-2) - 4*a(n-4) with a(0) = 2, a(1) = 1, a(2) = 3, a(3) = 1.at n=35A247564
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 662", based on the 5-celled von Neumann neighborhood.at n=34A286759
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 662", based on the 5-celled von Neumann neighborhood.at n=35A286759
• Expansion of (1 - x)/(1 - x - 7*x^2).at n=11A367456