Grasshopper, in order to know the answer you must first figure out the question.
H, H, D, P, ? (2)
P, L, T, Q, P, H, H, ? (5)
R, C, C, U, B, A, ? (9)
A, K, Q, J, T, N, E, ? (11)
M, V, E, M, J, S, ? (14)
D, P, N, G, C, M, ? (15)
M, K, S, P, S, ? (16)
Y, C, A, G, ? (18)
A, T, G, C, L, V, ? (48)
Z, O, T, T, F, F, S, S, E, N, ? (112)
H, H, L, B, B, C, ? (613)
A, A, N, S, A, ? (371017)
Hint 1:
The answer is 3 letters long
Hint 2 (Bounty Hint):
H, H, D, P, ?, Z. (2)
M, K, S, PH, S, ?, DP, DD, DQ... (16)
Also anyone who has a better title LMK