-1189

Appears in sequences

• a(n) = -a(n-1) - a(n-2) + a(n-3), a(0)=3, a(1)=-1, a(2)=-1.at n=22A073145
• Expansion of (3 + 2*x + 3*x^2)/(1 + x + 3*x^2 - x^3).at n=11A073496
• Row sums of a number triangle related to the Pell numbers.at n=34A110331
• First differences of A000463.at n=69A188652
• The Euclid tree with root 1 encoded by semiprimes, read across levels.at n=37A295512
• Expansion of Sum_{k>=1} x^k/(1 + x^k)^3.at n=43A320900
• Consider primitive pairs of integers (b, c) with b < 0 such that x^5 + b*x + c = 0 is irreducible and solvable by radicals: sequence gives values of b.at n=4A371557
• Consider primitive pairs of integers (b, c) with b < 0 such that x^5 + b*x + c = 0 is irreducible and solvable by radicals: sequence gives values of b.at n=5A371557