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A046262
Largest palindromic substring in 4^n.
2
1, 4, 6, 6, 6, 4, 9, 8, 55, 262, 8, 9, 777, 88, 545, 737, 949, 717, 767, 77, 777, 111, 444, 77, 767, 42624, 737, 9, 575, 7117, 606, 6116, 737, 838, 52825, 717, 828, 58085, 914323419, 676, 747, 585, 3113, 737, 9, 4224, 959, 838, 33, 5005, 22822, 12821, 282
OFFSET
0,2
MATHEMATICA
Table[Max[Select[FromDigits/@Flatten[Table[Partition[IntegerDigits[4^n], k, 1], {k, IntegerLength[4^n]}], 1], PalindromeQ]], {n, 0, 60}] (* Harvey P. Dale, Sep 25 2019 *)
CROSSREFS
Cf. A046270.
Sequence in context: A251738 A249022 A270541 * A147862 A029854 A329502
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Jun 15 1998
STATUS
approved