I took the index on the words, converted the range to binary, included 3 zeros, calculated the sha256 digest, took the 1st Element of the hexadecimal to transform it to binary, added 3 zeros to the 8 digits with the binary and obtained 00000010011 which interprets to 19 in decimal. https://socialbaskets.com/story4598712/new-step-by-step-map-for-ledger-seed-phrase-bip39