47071589413
domain: N
Appears in sequences
- a(n) = (3^n - 1)/2.at n=23A003462
- Cyclotomic polynomials at x=3.at n=23A019321
- a(n) = 2*a(n-1) + 3*a(n-2), a(0) = a(1) = 1.at n=23A046717
- Zsigmondy numbers for a = 3, b = 1: Zs(n, 3, 1) is the greatest divisor of 3^n - 1^n (A024023) that is relatively prime to 3^m - 1^m for all positive integers m < n.at n=22A064079
- Binomial transform of Jacobsthal gap sequence (A080924).at n=23A080925
- Maximal cycle lengths in a certain class of one-dimensional cellular automata.at n=44A085590
- a(n) = (3*9^n - 1)/2.at n=11A096053
- a(n) = 3*a(n-1) - a(n-3) + 3*a(n-4), with initial values 2,5,13,40.at n=22A133448
- a(n) = (3^n-1)/2 if n odd, (3^n-1)/8 if n even.at n=23A152298
- a(n) = (3*3^n-(-1)^n)/2.at n=22A164907
- Least primitive number k such that 1/k is in the Cantor set and the fraction 1/k has period n in base 3.at n=22A175174
- 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=23A261547
- Modulo 3 Pisano period of 'n-bonacci' series.at n=22A337212