OK I need the rule for this number sequance and to fill in the blanks 1, 3, 8, 19, 42, 89, __, __, __,?

Question

Please help me!

Answer 1

You double 1 to get 2 and add one to get 3
you double 3 to get 6 and add two to get 8
You double 8 to get 16 and add three to get 19... and so on
the next numbers would be 184, 375, 742

Answer 2

ok here how it's done...1 doubled is 2 then add 1 =3. 3 doubled is 6 then add 2= 8. 8 doubled is 16 then add 3 = 19. 19 doubled is 38 then add 4 = 42. 42 doubled is 84 then add 5 = 89.....and so on.

Answer 3

Here is the rule. Each element is two times the preceding element in the list plus the ordinal position of the preceding element in the list. Mathematically, we would represent it this way:

a(sub n) = 2[a(sub n-1)]+(n-1)

So, element 3 is two times the second element plus 2. Element 4 is two times the third element plus 3, etc.

With this, you can predict the remaining numbers in the sequence.