The cache is NOT at the posted coordinates.
below are two vertical series of number strings. determine the next two strings in the first series and the next three strings in the second series. then compute the sum of the digits in each of the new strings.
string sum
series 1:
- 5
- 15
- 1115
- 3115
- 132115
- 1113122115
- ???
- ???
series 2:
- 1
- 11
- 21
- 1211
- 111221
- 312211
- 13112221
- ???
- ???
- ???
the cache is located at N 38 07.QRS W 122 34.TUV
where:
Q = b + k - h
R = d + e - j
S = f + h - d
T = a + f - b
U = h + j - f
V = c + d - g

You can validate your puzzle solution with certitude.