I took the index in the words, converted the amount to binary, included a few zeros, calculated the sha256 digest, took the very first Portion of the hexadecimal to convert it to binary, added 3 zeros into the eight digits with the binary and obtained 00000010011 which interprets to 19 https://cruxbookmarks.com/story18852122/ledger-seed-phrase-bip39-no-further-a-mystery