Those are powers of 3 - each number is 3 times the previous number.
Next number= 27 X 3 = 81.
81 Each number is 3 x the previous number. So, 3 x 27 = 81.
For each term, multiply the previous by -3. So, 27*-3=-81. -81 is the next term.
1 3 8 27 32 1x3 =3 3+5=8 8x3=27 27+5=32
243
29 is the next prime number after 27. But 27 is not a prime! 3 x 9 = 27!
The sequence is generated using cubes, or n^3. The next number in the sequence will be 4^3, or 256.
27
27
It is 3 times 81 = 243
27
27