Random number generation from multinomial distribution in R using rmultinom() function

I would like to generate a sample of size 20 from the multinomial distribution with three values such as 1,2 and 3. For example, the sample can be like this sam=(1,2,2,2,2,3,1,1,1,3,3,3,2,1,2,3,...1)

the following code is working but not getting the expected result

> rmultinom(20,3,c(0.4,0.3,0.3))+1
     [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [,11] [,12] [,13] [,14] [,15] [,16] [,17] [,18] [,19] [,20]
[1,]    1    1    3    2    2    1    1    2    3     2     3     2     1     2     2     3     1     2     2     2
[2,]    2    1    2    1    3    2    4    2    1     2     2     1     1     2     1     2     3     2     3     3
[3,]    3    4    1    3    1    3    1    2    2     2     1     3     4     2     3     1     2     2     1     1

I am not expecting this matrix. Any help is appreciated?