corresponding coefficients at other levels in 2D wavelet

Dear all
how can i reach to the corresponding coefficient in other level in 2D wavelet transform
for example when i want to reach the corresponding coefficent of HH0 subband (after one level decomposition) in LL3 (approximation coefficents after 4 level decomposition) i can write:
c(i,j) ----------> in HH0 subband
m ( ceil(i/(2^(3-level))), ceil(j/(2^(3-level))) ) is corresponding coefficent at LL3 (if we let level=0) (m is wavelet coefficents of LL subband after 4 level decomposition)
but for some wavelets for example dbn (n>1) decomposition levels aren't power of 2.
for example when i apply db6 on an image with size of 512*512 the decomposition level's size would be
level 1 --------> 261*261
level 2 --------> 136*136
level 3 --------> 73*73
level 4 --------> 42*42
how can i do in this conditions?
can somebody give me an idea about it?
Thanks in advance
Regards