A309568 - cp's OEIS frontend

A309568 Bi-unitary k-hyperperfect numbers: numbers m such that m = 1 + k * (bsigma(m) - m - 1) where bsigma(m) is the sum of bi-unitary divisors of m (A188999) and k >= 1 is an integer.

n	a(n)
1	6
2	21
3	52
4	60
5	90
6	301
7	657
8	697
9	1333
10	1909
11	2041
12	2133
13	3901
14	15025
15	24601
16	26977
17	96361
18	130153
19	163201
20	176661
21	250321
22	275833
23	296341
24	389593
25	486877
26	495529
27	542413
28	808861
29	1005421
30	1005649
31	1055833
32	1063141
33	1232053
34	1246417
35	1284121
36	1357741
37	1403221

[6, 21, 52, 60, 90, 301, 657, 697, 1333, 1909, 2041, 2133, 3901, 15025, 24601, 26977, 96361, 130153, 163201, 176661, 250321, 275833, 296341, 389593, 486877, 495529, 542413, 808861, 1005421, 1005649, 1055833, 1063141, 1232053, 1246417, 1284121, 1357741, 1403221]

cp's OEIS Frontend

A309568 Bi-unitary k-hyperperfect numbers: numbers m such that m = 1 + k * (bsigma(m) - m - 1) where bsigma(m) is the sum of bi-unitary divisors of m (A188999) and k >= 1 is an integer.

Table of values

List of values