A144523 - cp's OEIS frontend

A144523 Triangular numbers n*(n+1)/2 with n and n+1 composite, where number of prime factors in n > number of prime factors in n+1.

n	a(n)
1	36
2	210
3	300
4	528
5	1035
6	1176
7	1275
8	1485
9	1596
10	2080
11	2346
12	2926
13	3240
14	3321
15	3570
16	4095
17	4278
18	5460
19	5565
20	6105
21	6555
22	6903
23	7260
24	8256
25	8778
26	9870
27	10440
28	11628
29	11935
30	12880
31	13695
32	14196
33	15576
34	16653
35	17020
36	17391
37	17955
38	20100
39	20910
40	21736
41	22578
42	23436
43	24310
44	25200
45	25425

[36, 210, 300, 528, 1035, 1176, 1275, 1485, 1596, 2080, 2346, 2926, 3240, 3321, 3570, 4095, 4278, 5460, 5565, 6105, 6555, 6903, 7260, 8256, 8778, 9870, 10440, 11628, 11935, 12880, 13695, 14196, 15576, 16653, 17020, 17391, 17955, 20100, 20910, 21736, 22578, 23436, 24310, 25200, 25425]

cp's OEIS Frontend

A144523 Triangular numbers n*(n+1)/2 with n and n+1 composite, where number of prime factors in n > number of prime factors in n+1.

Table of values

List of values