A269311 - cp's OEIS frontend

A269311 Consider the arithmetic derivative of a number x. Take the sum of its digits. Repeat the process deleting the first addendum and adding the previous sum. The sequence lists the numbers that after some iterations reach x.

n	a(n)
1	8
2	18
3	21
4	160
5	1590
6	2420
7	18620
8	69229
9	83790
10	279964
11	494520
12	598810
13	676450
14	1183147
15	4233720
16	5600348
17	14217074
18	20025836
19	64278677
20	425208387
21	604048830
22	750851470
23	1981942354

[8, 18, 21, 160, 1590, 2420, 18620, 69229, 83790, 279964, 494520, 598810, 676450, 1183147, 4233720, 5600348, 14217074, 20025836, 64278677, 425208387, 604048830, 750851470, 1981942354]

cp's OEIS Frontend

A269311 Consider the arithmetic derivative of a number x. Take the sum of its digits. Repeat the process deleting the first addendum and adding the previous sum. The sequence lists the numbers that after some iterations reach x.

Table of values

List of values