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A068065 Palindromes n for which there is a unique k such that n = k + reverse(k). 2
0, 2, 4, 6, 8, 11, 101, 141, 161, 181, 1001, 10001, 10201, 10401, 10601, 10801, 100001, 1000001, 1002001, 1004001, 1006001, 1008001, 10000001, 100000001, 100020001, 100040001, 100060001, 100080001, 1000000001, 10000000001 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Subsequence of A068062; A068062(k) is in this sequence if and only if A068064(k) = 1. At first sight, 121 seems to be missing, but in fact 121 does not belong here (cf. example in A068064).

LINKS

Table of n, a(n) for n=1..30.

EXAMPLE

10601 is in the sequence, since 10601 = 10300 + 00301 and for no other k we have 10601 = k + reverse(k).

CROSSREFS

Cf. A002113, A067030, A067032, A068062, A068064.

Sequence in context: A088169 A061563 A099994 * A278228 A028328 A274262

Adjacent sequences:  A068062 A068063 A068064 * A068066 A068067 A068068

KEYWORD

base,nonn

AUTHOR

Klaus Brockhaus, Feb 16 2002

STATUS

approved

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Last modified February 24 18:55 EST 2021. Contains 341584 sequences. (Running on oeis4.)