'Seeds' are a string of text and numbers that Minecraft uses to generate a world. So it controls all naturally-appearing terrain. Herobrine is added by a mod, there's no 'seed' for it, that's not what seeds are for.
Herobrine is not on any version of minecraft on any platform. He is simply a myth
'Herobrine' is an urban legend, and does not exist in any version of the game.
you cant any more because herobrine was removed from the game making it impossible to get any more
Lots of people "claim" to have seen Herobrine, but the truth is that Herobrine doesn't exist. There is no reference in the source code for any mob to act like Herobrine, therefore he is non existent. The only way Herobrine can exist is through mods.
Herobrine is not a part of any version of Minecraft, it is unlikely he ever will be.
No, herobrine isn't in ANY version in ANY edition of minecraft. He is a myth/legend.
no herobrine is not real if you see it it is fake!
Herobrine has never been in Minecraft, any edition.
Herobrine is not real and has never been real in any edition of Minecraft, or in any version of any edition. Anyone that tells you he is real is lying, and Notch did confirm that in a certain tweet on his Twitter, which you may find quoted on the Herobrine page on the Minecraft Wiki.
Herobrine's skin is basically a Steve (default) skin except the eyes are white. If you search "Herobrine" on any skin database website you can easily find one.
Herobrine is a Minecraft urban legend and was never in any official version of the game.