271445
domain: N
Appears in sequences
- a(n) = a(n-1) + a(n-2) - 2, a(0) = 4, a(1) = 3.at n=26A000211
- Expansion of (1 - x + 3*x^3 - 2*x^4 - 3*x^5)/(1 - 2*x + x^3).at n=26A048162
- a(n) = Lucas(n) + (-1)^n + 1.at n=25A068397
- a(n) = Lucas(4n+2)+2, or 5*Fibonacci(2n+1)^2.at n=6A081067
- a(n) = Fibonacci(2*n+1) + Fibonacci(2*n-1) + 2.at n=13A092387
- a(n) = 5*Fibonacci(n)^2.at n=12A099921
- Duplicate of A068397.at n=25A102081
- Let L(n) = Fibonacci(n-1)+Fibonacci(n+1) (cf. A000045, A000032); if n is even then a(n) = (L(n)+2)^2 otherwise a(n) = L(2*n)+2.at n=13A233000
- Duplicate of A092387.at n=13A240926