A083825 a(1) = 12; then numbers obtained at every stage of division by 9 in the following process: multiply by 9, reverse the digits, divide by 9, reverse the digits, multiply by 9, reverse the digits, divide by 9, ...

12, 89, 32, 78, 43, 67, 54, 56, 65, 45, 76, 34, 87, 23, 98, 12, 109, 1002, 10009, 100002, 1000009, 10000002, 100000009, 1000000002, 10000000009, 100000000002, 1000000000009, 10000000000002, 100000000000009, 1000000000000002, 10000000000000009

Offset

1,1

Links

Table of n, a(n) for n=1..31.

Example

*12 -> 108 -> 801 -> *89 -> 98 -> 882 -> 288 -> *32 -> 23 -> 207 -> 702 -> *78 -> 87 -> 783 -> 387 -> *43 -> 34 -> 306 -> 603 -> *67 -> 76...

Crossrefs

Cf. A083822, A083823, A083824.

Sequence in context: A181704 A009657 A012088 * A181944 A359311 A193285

Adjacent sequences: A083822 A083823 A083824 * A083826 A083827 A083828

Keyword

base,easy,nonn

Author

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 09 2003

Extensions

a(10) onward corrected by Sean A. Irvine, Feb 18 2026

Status

approved