A088642 If k is a palindrome made of only two nonzero digits a and b then the palindrome arising by swapping the digits a and b.

212, 313, 414, 515, 616, 717, 818, 919, 121, 323, 424, 525, 626, 727, 828, 929, 131, 232, 434, 535, 636, 737, 838, 939, 141, 242, 343, 545, 646, 747, 848, 949, 151, 252, 353, 454, 656, 757, 858, 959

Offset

1,1

Comments

If a(r) = s then a(s) = r.

Links

Table of n, a(n) for n=1..40.

Example

The term corresponding to 1221221 is 2112112 and vice versa.

Crossrefs

Sequence in context: A358873 A133651 A093807 * A251126 A078211 A158794

Adjacent sequences: A088639 A088640 A088641 * A088643 A088644 A088645

Keyword

base,easy,nonn

Author

Amarnath Murthy, Oct 27 2003

Status

approved