Example L$\mathrm{.}1\mathrm{.}1.$ Let's use Excel to build the sequence with first term $a_0=4$ and common difference $d=3.$

$(1)$ Be sure you have your Lab $1$ Excel Template open to the "Example L$\mathrm{.}1\mathrm{.}1.-2."$ tab.

$(2)$ We will put our index in column A$.$ After entering the first few indices $($e$.$g$.,0,1,2$ in A$2,3,$ and $4),$ highlight these cells then move your cursor to the bottom right corner of the highlighted boxes until your cursor becomes a black plus. Dragging down will cause Excel to autocomplete. Drag down until you reach an index of $20.$

$(3)$ Next, let's create our sequence in column B$.$ We start by putting $4$ in B$2($i$.$e$.,$ the $n=0$ term$).$ Since we get to the next term in the sequence by adding $3$ to the previous, in B$3,$ we put $"=B2+3".$ The $"="$ indicates to Excel that you are writing a formula and our formula instructs Excel to add $3$ to the entry in B$2.$

$(4)$ To complete the sequence, highlight B$3$ and, as when filling in Column A$,$ drag down from with the black plus until you get to term $20.$ If you've done things correctly, you should have an arithmetic sequence ending at $64$ in cell B$22.$