A114529 - cp's OEIS frontend

A114529 Let S(n)=sigma(|n|)/2-n; sequence gives numbers n such that S(S(S(S(n))))=n. May be called {1,2}-sociable number of orders 1 or 2 or 4.

n	a(n)
1	41
2	929
3	1301
4	30240
5	32760
6	260609
7	1441440
8	1860768
9	2178540
10	3205440
11	3378240
12	3423420
13	3914820
14	4029480
15	4437720
16	5738040
17	6093360
18	6807240
19	7136640
20	7239120
21	7551360
22	9402120
23	10204740
24	12270720
25	12405120
26	12942720
27	13495680
28	14627340
29	14725620

[41, 929, 1301, 30240, 32760, 260609, 1441440, 1860768, 2178540, 3205440, 3378240, 3423420, 3914820, 4029480, 4437720, 5738040, 6093360, 6807240, 7136640, 7239120, 7551360, 9402120, 10204740, 12270720, 12405120, 12942720, 13495680, 14627340, 14725620]

cp's OEIS Frontend

A114529 Let S(n)=sigma(|n|)/2-n; sequence gives numbers n such that S(S(S(S(n))))=n. May be called {1,2}-sociable number of orders 1 or 2 or 4.

Table of values

List of values