549755289600
domain: N
Appears in sequences
- a(n) = 2^(n-1)*(2^n - (-1)^n).at n=20A003674
- a(n) = 2^(n-1)*(2^n - 1), n >= 0.at n=20A006516
- a(n) = 4^n*(4^n - 1)/2.at n=10A026337
- Number of reversible strings with n beads of 4 colors. If more than 1 bead, not palindromic.at n=19A032087
- Smallest triangular number with n prime factors (counted with multiplicity).at n=25A075088
- Numbers of the form 2^(n-1)*(2^n - 1) which aren't perfect numbers.at n=13A144858
- a(n) = 6*a(n-1) - 8*a(n-2) for n > 1, a(0)=1, a(1)=6.at n=19A171476
- a(n) = 6*a(n-1) - 8*a(n-2) for n > 1; a(0) = 6, a(1) = 28.at n=18A171496
- Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 276", based on the 5-celled von Neumann neighborhood.at n=38A287470
- Cogrowth sequence of the 16-element group C4:C4 = <S,T | S^4, T^4, STST^3>.at n=21A377855