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A082205 Palindromes pertaining to A082204. 2
1, 22, 232, 3223, 22322, 232232, 3223223, 22322322, 232232232, 3223223223, 22322322322, 232232232232, 3223223223223, 22322322322322, 232232232232232, 3223223223223223, 22322322322322322, 232232232232232232, 3223223223223223223 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Perhaps no digits other than 1,2 and 3 occur. From the second term onwards the periodic pattern of two 2's followed by a 3 holds.

LINKS

Table of n, a(n) for n=1..19.

Index entries for linear recurrences with constant coefficients, signature (0, 0, 1001, 0, 0, -1000).

EXAMPLE

The first six palindromes are:  1, 22, 232, 3223,22322, 232232.

MATHEMATICA

Join[{1}, LinearRecurrence[{0, 0, 1001, 0, 0, -1000}, {22, 232, 3223, 22322, 232232, 3223223}, 18]] (* Ray Chandler, Aug 25 2015 *)

CROSSREFS

Cf. A082204, A082206.

Sequence in context: A047647 A010938 A022617 * A003205 A037268 A091783

Adjacent sequences:  A082202 A082203 A082204 * A082206 A082207 A082208

KEYWORD

base,easy,nonn

AUTHOR

Amarnath Murthy, Apr 10 2003

EXTENSIONS

More terms from Joshua Zucker, May 08 2006

STATUS

approved

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Last modified July 4 18:38 EDT 2020. Contains 335448 sequences. (Running on oeis4.)