A112401 1-digit squares with their digits reversed, then 2-digit squares reversed, and so on, including squares zero-padded on the left but excluding squares ending in 0.

1, 4, 9, 10, 40, 90, 61, 52, 63, 94, 46, 18, 100, 400, 900, 610, 520, 630, 940, 460, 180, 121, 441, 961, 691, 522, 652, 982, 423, 163, 144, 484, 925, 675, 526, 676, 927, 487, 148, 169, 1000, 4000, 9000, 6100, 5200, 6300, 9400, 4600, 1800, 1210, 4410, 9610

Offset

1,2

Links

Table of n, a(n) for n=1..52.

Example

The sequence represents the squares (1, 4, 9), (01, 04, 09, 16, 25, 36, 49, 64, 81), (001, 004, 009, 016, 025, 036, 049, 064, 081, 121, 144, 169, ...), each entry zero-padded to the left as necessary, then reversed. Note 100 does not appear, since squares with a trailing 0 are ignored.

Crossrefs

Sequence in context: A121215 A178224 A102985 * A178360 A197125 A197129

Adjacent sequences: A112398 A112399 A112400 * A112402 A112403 A112404

Keyword

nonn,base

Author

Jonathan P. Moore (jonathan.peter.moore(AT)gmail.com), Dec 06 2005

Extensions

More terms from R. J. Mathar, Feb 08 2008

Edited by Sean A. Irvine, Jul 06 2026

Status

approved