There is no pattern in the numbering.
In which cells you will put the formulas.
You have something like this:
Hoja12
[TABLE="class: grid, width: 500"]
<tbody>[TR]
[TD][/TD]
[TD]A[/TD]
[TD]B[/TD]
[TD]C[/TD]
[TD]D[/TD]
[TD]E[/TD]
[TD]F[/TD]
[TD]G[/TD]
[TD]H[/TD]
[TD]I[/TD]
[TD]J[/TD]
[TD]K[/TD]
[TD]L[/TD]
[TD]M[/TD]
[TD]N[/TD]
[TD]O[/TD]
[TD]P[/TD]
[TD]Q[/TD]
[TD]R[/TD]
[TD]S[/TD]
[TD]T[/TD]
[TD]U[/TD]
[TD]V[/TD]
[/TR]
[TR]
[TD="align: center"]34[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: center"]35[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD="align: right"]1[/TD]
[TD="align: right"]2[/TD]
[TD="align: right"]3[/TD]
[TD="align: right"]4[/TD]
[TD="align: right"]5[/TD]
[TD="align: right"]6[/TD]
[TD="align: right"]7[/TD]
[TD="align: right"]8[/TD]
[TD="align: right"]9[/TD]
[TD="align: right"]10[/TD]
[TD="align: right"]11[/TD]
[TD="align: right"]12[/TD]
[TD="align: right"]13[/TD]
[TD][/TD]
[TD="align: right"]10[/TD]
[TD="align: right"]26[/TD]
[TD="align: right"]55[/TD]
[/TR]
[TR]
[TD="align: center"]36[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
</tbody>[/TABLE]
[TABLE="class: grid, width: 500"]
<tbody>[TR]
[TD]Formula[/TD]
[/TR]
[TR]
[TD][TABLE="class: grid, width: 500"]
<tbody>[TR]
[TD]Cell[/TD]
[TD]Formula[/TD]
[/TR]
[TR]
[TD]T35[/TD]
[TD]=SUM(OFFSET($F$35,,0,,4))[/TD]
[/TR]
[TR]
[TD]U35[/TD]
[TD]=SUM(OFFSET($F$35,,4,,4))[/TD]
[/TR]
[TR]
[TD]V35[/TD]
[TD]=SUM(OFFSET($F$35,,8,,5))[/TD]
[/TR]
</tbody>[/TABLE]
[/TD]
[/TR]
</tbody>[/TABLE]