A033896 - OEIS

A033896

Sort then Add!.

9, 18, 36, 72, 99, 198, 387, 765, 1332, 2565, 5121, 6246, 8712, 9990, 10989, 12888, 25776, 51453, 64908, 69597, 126396, 250065, 252621, 374877, 722655, 948222, 1170711, 1281888, 2410776, 2535453, 4870008, 4874796, 9342585, 11688174, 22834962, 45069651

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

OFFSET

1,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

MATHEMATICA

NestList[FromDigits[Sort[IntegerDigits[#]]]+#&, 9, 40] (* Harvey P. Dale, Aug 19 2014 *)

PROG

(Python)

from itertools import accumulate

def sta(anm1, _): return anm1 + int("".join(sorted(str(anm1))))

print(list(accumulate([9]*36, sta))) # Michael S. Branicky, Sep 18 2021