On Hardy's Apology Numbers

نویسندگان
Koppelaar, Dr. Henk ID 1
Nasehpour, Peyman ID 2

1 Faculty of Electrical Engineering, Mathematics and Computer Science, Delft University of Technology, Delft, The NetherlandsVredenburchstede 20

2 Department of Engineering Science \\ Golpayegan University of Technology

doi
10.22059/jac.2020.79248
چکیده

Twelve well known `Recreational' numbers are generalized and classified in three generalized types Hardy, Dudeney, and Wells. A novel proof method to limit the search for the numbers is exemplified for each of the types. Combinatorial operators are defined to ease programming the search.

کلیدواژه‌ها
Hardy's apology numbers, Armstrong numbers, Dudeney numbers, Wells numbers