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A132285 Mirror odd numbers. 3
11, 33, 55, 77, 99, 1001, 1111, 1221, 1331, 1441, 1551, 1661, 1771, 1881, 1991, 3003, 3113, 3223, 3333, 3443, 3553, 3663, 3773, 3883, 3993, 5005, 5115, 5225, 5335, 5445, 5555, 5665, 5775, 5885, 5995, 7007, 7117, 7227, 7337, 7447, 7557, 7667, 7777, 7887 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Mirror numbers have even number of digits with property that left half digits is mirror of right half digits.

LINKS

Table of n, a(n) for n=1..44.

FORMULA

A005408 INTERSECT A001637 INTERSECT A002113. - R. J. Mathar, Aug 22 2007

PROG

(PARI) isok(n) = {if (n % 2 == 0, return (0)); d = digits(n); if (#d % 2 == 1, return (0)); for (i=1, #d/2, if (d[i] != d[#d-i+1], return (0)); ); return (1); } \\ Michel Marcus, Nov 05 2013

CROSSREFS

Cf. A005408, A001637, A002113, A132286, A132288.

Sequence in context: A022671 A029516 A061833 * A152740 A080859 A063036

Adjacent sequences:  A132282 A132283 A132284 * A132286 A132287 A132288

KEYWORD

nonn,base

AUTHOR

Artur Jasinski, Aug 16 2007

STATUS

approved

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Last modified April 18 11:12 EDT 2014. Contains 240707 sequences.