pentadecathlon

plural pentadecathlons

1. A sporting event consisting of fifteen different sports or contests.
2. cellular automataA particular oscillator that returns to its initial state after 15 generations.

   The speed was very dependent on the number of live cells, but it ran the pentadecathlon at 92 gen/sec in the last version I measured.

   2002 July 23, Owen Rees, “Wolfram and "general 2D simulators"”, in comp.theory.cell-automata (Usenet)

   1 more example

   X! Produces a westward stream of lightweight spaceships representing prime numbers: a LWSS escapes past the pentadecathlon around generation 120n+100 if and only if n is prime.

   1993 March 16, David Bell, “Life program (part 6/18)”, in comp.theory.cell-automata (Usenet)