this time I've analyzed Ken Shirriff's video "Tediously toggling a program into the IBM 1401 mainframe" https://youtu.be/Sr9mmsLQmYs and tested this program on my own "1401".
2:59 running the program

0:00 start
0:06 description
0:18 presenting the original video
0:32 noting down the switch positions
0:52 the result
0:58 analyzing
1:24 the algorithm
1:31 the 1401 machine program
1:38 action!
2:09 the program on puched cards
2:59 running the program
3:55 the result

watching paint dry: https://youtu.be/PLOPygVcaVE

https://rolffson.de/
https://computerhistory.org/
http://ibm-1401.info/
https://youtu.be/Sr9mmsLQmYs

always use latest version of simulation, see rolffson.de