A269307 - cp's OEIS frontend

A269307 Consider the sum of the divisors of a number x>1. 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	17
2	28
3	31
4	44
5	51
6	132
7	133
8	198
9	208
10	2528
11	9241
12	13570
13	16577
14	177568
15	228742
16	780889
17	878078
18	1854920
19	2775787
20	3663541
21	8204010
22	66326143
23	73734437
24	164211532
25	670396359
26	803230921
27	832581731
28	1036125551
29	1572413223

[17, 28, 31, 44, 51, 132, 133, 198, 208, 2528, 9241, 13570, 16577, 177568, 228742, 780889, 878078, 1854920, 2775787, 3663541, 8204010, 66326143, 73734437, 164211532, 670396359, 803230921, 832581731, 1036125551, 1572413223]

cp's OEIS Frontend

A269307 Consider the sum of the divisors of a number x>1. 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