A139704 - OEIS

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A139704

Nearly palindromic numbers: non-palindromes that can be made palindromic by inserting an extra digit.

10, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 78, 79, 80, 81, 82, 83, 84, 85

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Digits may be inserted at the beginning, middle, or end. However, a zero may not be inserted at the beginning.

Differs from A043638: 110, 220, 330, 440, 550, 660, 770, 880, 990, 1100, 1110 etc. are in A043638 but not here. 1010, 1011, 1012, 1013 etc. are here but not in A043638. - R. J. Mathar, May 31 2008

LINKS

Table of n, a(n) for n=1..69.

EXAMPLE

The first term 10 can be made palindromic by adding 1 to the end of it to form 101.

CROSSREFS

Cf. A002113, A139705, A043638.

Sequence in context: A301860 A109394 A285687 * A139819 A288040 A031955

Adjacent sequences: A139701 A139702 A139703 * A139705 A139706 A139707

KEYWORD

easy,nonn,base

AUTHOR

Jono Henshaw (jjono(AT)hotmail.com), Apr 30 2008

STATUS

approved