What can I do?
You could find tools that automate the trying of various combinations of seed-words. Some are mentioned in similar questions here. For example btctools, btcrecover. Use them or adapt them to your needs.
Lost my Bitcoin wallet and have only 11 out of 12 mnemonic seed phrase words. How can I get my Bitcoins?
Need help to recover blpckchain....
Bitcoin Core is not affiliated with the website you downloaded the node installer from - bitsblock.io, and the official Bitcoin Core client does not provide functionality you ask about. I noticed that when you click on download button on this website it takes you to some restore form. This seems very sketchy - I'd never provide online my private key nor any ...
No, bitcoin core does not expand environment variables in bitcoin.conf.
See here to see how options are parsed.
You can expand environment variables as arguments for bitcoind:
$ bitcoind -rpcuser="$RPC_USERNAME" -rpcpassword="$RPC_PASSWORD"
Was bitcoin the first to use a seed phrase design.
I've no idea whether Bitcoin was the first cryptocurrency for which there was a wallet that supported a system of seed-phrases.
Not all Bitcoin wallets support seed-phrases. Notably the reference implementation Bitcoin- Core does not yet support seed phrases.
BIP39 - Mnemonic code for generating ...
Actually the answer is rather simple, Cryptosteel did a letter frequency analysis on the bip39 wordlist and found that you can represent any word in the list using only 4 characters. Therefore, for a 24 word recovery phrase, you take 4x24 or 96 characters.
Edit: Oh oops, I thought the question was that ability to store all combinations instead of the tiles ...