adaptive_permtest2_os: One-sample adaptive permutation test with subsampling
In floatofmath/adaperm: Permutation tests for adaptive designs

Adaptive permutation test one-sample problems

1 2	adaptive_permtest2_os(x, n1, n, ne, test_statistic, perms = 50000, resam = 100, alpha = 0.025)

`x`	Observations
`n1`	First stage sample size
`n`	Pre-planned total sample size
`ne`	Extended sample size
`perms`	Maximum number of permutations to use when computing permutation p-values and conditional error rates
`combination_function`	Function to combine stage-wise (permutation) p-values