login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..52.

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

Adjacent sequences:  A046259 A046260 A046261 * A046263 A046264 A046265

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Jun 15 1998

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 26 12:37 EDT 2022. Contains 354883 sequences. (Running on oeis4.)