The nᵗʰ tetrahedral number can be calculated with the formula (n+1)³-(n+1)/6.

I’d like another drink please.

Just need to project against users from deleting NK.BIN and bricking the device.

“Bring us a bottle, then.” “Bring twa,” here interrupted Johnny Yuill, in a loud voice; “for I′m dooms dry, and ′ll sen′ owre a bottle to my ain share at a waucht, and I′m sure ye′ll manage the ither yersel, Provost; and, if ye canna, I′ll help ye wi′ that, too.”