NAS's(Nebulas) mnemonic official path is m/44'/2718'/0'/0/0.
Accoding to the BIP-39, the mnemonic code is another form of private key. So we also support the mnemonic code, and we follow the BIP-44 protocal (Multi-Account Hierarchy for Deterministic Wallets). Therefore, mnemonic code can be generate not only one private key(block chain address), to a certain extent, you just need hold one mnemonic words to back up all your wallets.
The Nebulas's mnemonic official path is m/44'/2718'/0'/0/0. Accoding to the BIP-44, the different block chain's mnemonic path should have the different "Coin type" (Path level is:m / purpose' / coin_type' / account' / change / address_index).
We choose the 2718 as Nebulas's Coin type, which is from the Euler's number. The number e is a magic mathematical constant, approximately equal to 2.71828, which is considered as the most beautiful number.
Nebulas's mnemonic role is follow the BIP's common convention, here is the references:
BIP-39
BIP-39-wordlists
BIP-44
SLIP-0044