141214768240
domain: N
Appears in sequences
- a(n) = (3^n - 1)/2.at n=24A003462
- a(n) = (-1)^n * (3^n - 1)/2.at n=24A076040
- Maximal term in Collatz-iteration started at 3^n-1.at n=22A087971
- a(n) = 3*a(n-1) - a(n-3) + 3*a(n-4), with initial values 1,4,14,41.at n=23A132357
- a(0) = 1 and a(n) = (3^n - (-1)^n)/2 for n >= 1.at n=24A152011
- a(n) = (9^n - 1)/2.at n=12A191681
- The 3 X 3 X ... X 3 dots problem (3, n times): minimal number of straight lines (connected at their endpoints) required to pass through 3^n dots arranged in a 3 X 3 X ... X 3 grid.at n=24A261547