CREATE OWN LIBRARY

The program is written here to print the series 

# One for loop is used to print the series. 

# The initial three terms of the series is 1, 3 and 4. 

# From the 4th term, the value of each term is the sum of previous three terms.

For example, let the input be 6.

1st term: 1

2nd term: 3

3rd term: 4

4th term: (4 + 3 + 1) = 8

5th term: (8 + 4 + 3) = 15

6th term: (15 + 8 + 4) = 27

Therefore, the output series will be:

1 3 4 8 15 27

INPUT: Number of terms

OUTPUT: The aforesaid series up to nth term

PROCESS:

Step 1: [Taking the input]

               Read n [Number of terms]

Step 2: [Printing the series]          

               Set a<-1

               Set b<-3

               Set c<-4

               Print "The series is: a, b, c"

               For i=4 to n repeat

                              Set sum <- a+b+c

                              Print sum

                              Set a <- b

                              Set b <- c

                              Set c <- sum

               [End of ‘for’ loop]

Step 3: Stop.