Calculate allele likelihoods for 3-state allele HMM
calc_allele_lik_s3(pAD, DP, R, p_s, t, theta, gamma = 20, r = 0.015)
integer vector Paternal allele counts
integer vector Total alelle counts
numeric vector Phase switch probabilities
numeric Haplotype imbalance
numeric Overdispersion in the allele-specific expression