I have observed that BTC Address 1111111111111111111114oLvT2 has the public key RIPEMD 160 Hash is 0000000000000000000000000000000000000000 whereby 111111111111111111112BEH2ro has the public RIPEMD 160 Hash is 000000000000000000000000000000000000000A many of address has been generated in this sequence of 160 hash among them many dormant wallets which were active in past few years and still has positive balance. what my question is how these address has been created ? does they really have private key ? if yes then is the private key would be sequential as well?
These are probably "proof of burn" addresses.
The corresponding private key is unknown. If the private key was known, the public key hash would look much more random. By creating a non-random-looking public key hash, one proves that they almost certainly don't know the corresponding private key. If nobody knows the private key, bitcoins sent there are effectively deleted.
Why would someone delete bitcoins? Well, for example, it's one way to start up a new alt-coin. You can give people altcoins in exchange for deleting their bitcoins. Some people consider this more fair than giving out altcoins based on proof-of-work or random chance.