A382164 Palindromic Kaprekar numbers that are not repdigit Kaprekar numbers.

909090909, 9090909090909090909090909090909, 81188118811881188118811881188118, 545545545545545545545545545545545, 277227722772277227722772277227722772, 505050505050505050505050505050505050505, 4040404040404040404040404040404040404040404040404

Offset: 1

Author

N. J. A. Sloane, Mar 26 2025

Keywords

• nonn
• base

Comments

[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 9.2.4.

Crossrefs

Cf. A006886.

A382163 is the union of this sequence and A145875.