Programmatically retrieve Accession List from NCBI
Which accessions are you trying to get to? In the page you refer to, there is an option to download the list of accessions - one SRR run accession per line - by clicking the 'Accessions' button or the entire table by clicking the 'Metadata' button as highlighted in the screenshot below:

You can get the same data from the command line using the Entrez Direct. The command for that would be something like:
esearch -db sra -query 'PRJNA491191[bioproject]' | efetch -format runinfo

to download the table in CSV format.