Template:Xpdt/1xchain2021
20
21
start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-20-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end
start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-21-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end
This page contains chains of 20 and 21 calls of Template:1x, and of Template:t1. It demonstrates that although 40 calls are allowed directly, only 20 are if the page is transcluded:
Directly (for t1):
start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-40-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end
{{xpdt/1xchain2021}}
gives:
20
21
start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-20-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end
start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-start-21-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end-end