A052058 Numbers k such that the largest palindromic substring (without leading zeros) of 2^k is a repdigit of minimum length 2.
16, 24, 25, 26, 27, 38, 39, 40, 42, 43, 44, 45, 46, 51, 95, 96, 108, 169, 191, 193, 198, 202, 205, 247, 250, 316, 317, 379, 386, 421, 422, 423, 425, 485, 486, 488, 589, 592, 642, 643, 659, 731, 736, 758, 759, 800, 835, 839, 927, 971, 972, 978
Offset: 1
Examples
2^44 = 175921860{444}16 and this repdigit 444 is its largest palindromic substring.
Links
- Sean A. Irvine, Table of n, a(n) for n = 1..79
Extensions
Offset changed to 1 by Jon E. Schoenfield, Oct 17 2019