A225503 - cp's OEIS frontend

A225503 Least triangular number t such that t = prime(n)*triangular(m) for some m>0, or 0 if no such t exists.

n	a(n)
1	6
2	3
3	15
4	21
5	66
6	78
7	1326
8	190
9	1035
10	435
11	465
12	17205
13	861
14	903
15	9870
16	5565
17	1567335
18	16836
19	20100
20	2556
21	2628
22	49770
23	55278
24	4005
25	42195
26	413595
27	47895
28	10100265
29	5995
30	1437360
31	32131
32	8646
33	1352190
34	19559385
35	54397665
36	1642578
37	12246
38	52975
39	501501
40	134940
41	336324807802305

[6, 3, 15, 21, 66, 78, 1326, 190, 1035, 435, 465, 17205, 861, 903, 9870, 5565, 1567335, 16836, 20100, 2556, 2628, 49770, 55278, 4005, 42195, 413595, 47895, 10100265, 5995, 1437360, 32131, 8646, 1352190, 19559385, 54397665, 1642578, 12246, 52975, 501501, 134940, 336324807802305]

cp's OEIS Frontend

A225503 Least triangular number t such that t = prime(n)*triangular(m) for some m>0, or 0 if no such t exists.

Table of values

List of values