A382161 "Repunit" Kaprekar numbers.

1, 1111111111, 1111111111111111111, 1111111111111111111111111111, 1111111111111111111111111111111111111, 1111111111111111111111111111111111111111111111

Offset: 1

Author

N. J. A. Sloane, Mar 25 2025

Keywords

• nonn
• base
• more

Comments

Kaprekar numbers (A006886) all of whose digits are 1's.

Not a very interesting sequence in itself, but needed for clarifying A145875.

[The data is copied from Gupta (2025); it would be nice to have it confirmed]

Links

• Shyam Sunder Gupta, On Some Marvellous Numbers of Kaprekar, Exploring the Beauty of Fascinating Numbers, Springer (2025) Ch. 9, 275-315. See Section 9.2.2.

Crossrefs

Cf. A006886, A145875.