Question

What is the pattern in these numbers
1, 2, 7, 20, 61, 182

Answer 1

The next one OS either the previous one times 3 then plus one or minus one

Answer 2

3 +1 is next
pattern is
*3-1
*3+1

Answer 3

0, 1, 2, 7, 20, 61, 182, 547

3(0) + 2(1) = 2;
3(1) + 2(2) = 7;
3(2) + 2(7) = 20;
3(7) + 2(20) = 61;
3(20) + 2(61) = 182;
3(61) + 2(182) = 547;

@parmiss The above is not my work and comes from this site:
http://www.syvum.com/cgi/online/serve.cgi/iq/ar_series4.html?table

Read more about the sequence and its nth term there.