-8641

Appears in sequences

• a(n) = -a(n-1) - 2*a(n-2).at n=29A001607
• Expansion of (1 + 2*x)/(1 + 3*x + 4*x^2).at n=14A087168
• Lucas and Lehmer numbers with parameters (1 +- sqrt(-7))/2.at n=29A107920
• Row sums of the Riordan array (1-4x+4x^2, x(1-2x)) (A167431).at n=26A167433
• a(0) = -1, otherwise a(n) = (-1)^n*(n^3 - 15*n^2 + 2*n - 12)/6.at n=43A173248
• G.f.: 1/(1+x+x^3).at n=25A199804
• 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=29A247487
• a(n) = 3*a(n-1) - 4*a(n-2) with a(0) = a(1) = 1.at n=14A247560
• 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=29A247564