564859072962
domain: N
Appears in sequences
- Pisot sequences E(2,6), L(2,6), P(2,6), T(2,6).at n=24A008776
- a(0)=1; a(n) = 2*3^(n-1) for n >= 1.at n=25A025192
- a(n) = Sum_{k=0..m} (k+1) * A026148(n, m-k), where m=0 for n=1; m=n+1 for n >= 2.at n=24A027334
- Dirichlet convolution of powers of 3 (3,9,27,...) with themselves.at n=22A034719
- a(n) = (5*3^n + (-3)^n)/6.at n=25A083423
- Expansion of (1+3*x)/(1-3*x).at n=24A099856
- a(1) = 3, a(n+1) = 2*(3^n).at n=24A110593
- Number of (n+1) X 2 0..2 arrays with every 2 X 3 or 3 X 2 subblock having exactly three counterclockwise and three clockwise edge increases.at n=22A206143
- Expansion of g.f. (1-7*x)/(1-9*x).at n=13A270369