A338133 - cp's OEIS frontend

A338133 Primitive nondeficient numbers sorted by largest prime factor then by increasing size. Irregular triangle T(n, k), n >= 2, k >= 1, read by rows, row n listing those with largest prime factor = prime(n).

n	a(n)
2	6
3	20
4	28
5	70
6	945
7	1575
8	2205
9	88
10	550
11	3465
12	5775
13	7425
14	8085
15	12705
16	104
17	572
18	650
19	1430
20	2002
21	4095
22	6435
23	6825
24	9555
25	15015
26	78975
27	81081
28	131625
29	189189
30	297297
31	342225
32	351351
33	570375
34	63126063
35	99198099
36	117234117
37	272
38	748
39	1870
40	2210
41	5355
42	8415
43	8925
44	11492

[6, 20, 28, 70, 945, 1575, 2205, 88, 550, 3465, 5775, 7425, 8085, 12705, 104, 572, 650, 1430, 2002, 4095, 6435, 6825, 9555, 15015, 78975, 81081, 131625, 189189, 297297, 342225, 351351, 570375, 63126063, 99198099, 117234117, 272, 748, 1870, 2210, 5355, 8415, 8925, 11492]

cp's OEIS Frontend

A338133 Primitive nondeficient numbers sorted by largest prime factor then by increasing size. Irregular triangle T(n, k), n >= 2, k >= 1, read by rows, row n listing those with largest prime factor = prime(n).

Table of values

List of values