A353034 - cp's OEIS frontend

A353034 Numbers m such that tau(m) = 2 * tau(m + 1) and simultaneously sigma(m) = 2 * sigma(m + 1), where tau(k) = A000005(k) and sigma(k) = A000203(k).

n	a(n)
1	20118
2	20712
3	79338
4	103410
5	203898
6	267630
7	570342
8	907710
9	1093026
10	1228062
11	1263918
12	1663752
13	2322760
14	3268782
15	3468486
16	3527250
17	5483418
18	6277038
19	6500442
20	7637980
21	9181578
22	9297078
23	17708178
24	18638646
25	25274946
26	25364526
27	25768302
28	25909254
29	31118664

[20118, 20712, 79338, 103410, 203898, 267630, 570342, 907710, 1093026, 1228062, 1263918, 1663752, 2322760, 3268782, 3468486, 3527250, 5483418, 6277038, 6500442, 7637980, 9181578, 9297078, 17708178, 18638646, 25274946, 25364526, 25768302, 25909254, 31118664]

cp's OEIS Frontend

A353034 Numbers m such that tau(m) = 2 * tau(m + 1) and simultaneously sigma(m) = 2 * sigma(m + 1), where tau(k) = A000005(k) and sigma(k) = A000203(k).

Table of values

List of values