# Math Help - Identifying the sequence

1. ## Identifying the sequence

hi, i'm unable to get the pattern for the sequence: 2,4,11,36,147,778,.. I even checked in oeis.org but it doesn't have it. Could someone please help in determining how the terms are related to each other in this sequence?
Thanks.

2. ## Re: Identifying the sequence

Hello, pranay!

Are there typos?
With a different first term and sixth term, I have a pattern.

Sequence: .1, 4, 11, 36, 147, 738 . . .

$a_{n+1} \:=\:n\:\!a_n + 3$

3. ## Re: Identifying the sequence

Thanks Soroban, no there are no typos the terms are as it is..

4. ## Re: Identifying the sequence

It's an=n!+2n-n

5. ## Re: Identifying the sequence

Originally Posted by ignite
It's an=n!+2n-n
How did you do that? Do you have Ramanujan's blood running in your veins?

6. ## Re: Identifying the sequence

I came across this problem on SPOJ.I first guessed the factorial part.And the rest could be found on OEIS.