A185129 - cp's OEIS frontend

A185129 a(n) = smaller member of n-th pair of distinct, positive, triangular numbers whose sum and difference are also triangular numbers.

n	a(n)
1	15
2	105
3	378
4	780
5	2145
6	1485
7	5460
8	7875
9	29403
10	21945
11	70125
12	105570
13	61425
14	37950
15	255255
16	306153
17	61425
18	667590
19	749700
20	522753
21	1016025
22	353220
23	176715
24	1471470
25	1445850
26	1747515
27	246753
28	794430
29	749700
30	514605
31	3499335
32	2953665
33	5073705
34	635628
35	8382465

[15, 105, 378, 780, 2145, 1485, 5460, 7875, 29403, 21945, 70125, 105570, 61425, 37950, 255255, 306153, 61425, 667590, 749700, 522753, 1016025, 353220, 176715, 1471470, 1445850, 1747515, 246753, 794430, 749700, 514605, 3499335, 2953665, 5073705, 635628, 8382465]

cp's OEIS Frontend

A185129 a(n) = smaller member of n-th pair of distinct, positive, triangular numbers whose sum and difference are also triangular numbers.

Table of values

List of values