A144524 - cp's OEIS frontend

A144524 Triangular numbers n*(n+1)/2 with n composite, where number of prime factors of n, counted with multiplicity, is less than the number of prime factors in n+1.

n	a(n)
1	120
2	351
3	630
4	780
5	1225
6	1326
7	1540
8	1953
9	2016
10	2145
11	2415
12	2775
13	3003
14	3828
15	4186
16	4560
17	4950
18	6216
19	6670
20	7140
21	7626
22	7875
23	8385
24	9045
25	10296
26	10731
27	12090
28	12720
29	13041
30	14365
31	15400
32	16836
33	17205
34	17578
35	17766
36	18915
37	19110
38	20706
39	21321
40	21528

[120, 351, 630, 780, 1225, 1326, 1540, 1953, 2016, 2145, 2415, 2775, 3003, 3828, 4186, 4560, 4950, 6216, 6670, 7140, 7626, 7875, 8385, 9045, 10296, 10731, 12090, 12720, 13041, 14365, 15400, 16836, 17205, 17578, 17766, 18915, 19110, 20706, 21321, 21528]

cp's OEIS Frontend

A144524 Triangular numbers n*(n+1)/2 with n composite, where number of prime factors of n, counted with multiplicity, is less than the number of prime factors in n+1.

Table of values

List of values