-3824
domain: Z
Appears in sequences
- a(n) = Sum_{k=0..floor(n/3)} C(n-k,2*k) * 2^k * (-2)^(n-3*k).at n=10A099784
- a(n) = Sum_{k=0..floor(n/3)} C(n-k,2*k) * 2^k * (-2)^(n-3*k).at n=12A099784
- Expansion of -2*x/(1 - 4*x + 2*x^2).at n=7A106731
- A symmetrical triangle sequence: T(n, k) = q^k + q^(n-k) - q^n, with q=4.at n=23A176227
- A symmetrical triangle sequence: T(n, k) = q^k + q^(n-k) - q^n, with q=4.at n=25A176227