Evolve to the next triangle numberblock, or the next numberblock that's a member of the step squad. Starts out with 1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 66, 78, 91, and so forth.
Credit to @bluejay7, @Numberscratchers_30, Music Owners and Everyone Else! No Reporting!
