In this investigation, students use the patterns formed by bowling pins to reinforce knowledge of sequences and series and to investigate how the sequences relate to the graphs. Students will be able to identify a sequence, write a recursive and closed form definition, and graph. The student will also be able to calculate the sequence of partial sums and graph the corresponding function. Finally, the student will be able to use their knowledge of triangular and square numbers to make a prediction about pentagonal numbers. I have used this as a cumulative project at the end of the unit on sequences and series and leading into our graphing unit - also works great cooperatively!