place first pin, then copy it, then paste array. 30 seconds, including guessing which way the array will go, and whether the pins numbers will increment right:)
No need for Excel...
(The same works for complex stuff - copy and paste an array of pins, then paste the names and numbers in over them in the pin editor, having copied them from the datasheet pdf (ALT for column select). )
Bear in mind that you'll have to kick the pin inspector into 'edit' mode, rather than inspect - but that's less hidden than it used to be. No Altium on this machine, hence the vagueness, I'm afraid. Shout if you can't work it out.