A240914 - cp's OEIS frontend

A240914 Semiprimes of the form S(n) + T(n) where S(n) and T(n) are the n-th square and the n-th triangular numbers.

n	a(n)
1	15
2	26
3	57
4	77
5	155
6	187
7	301
8	551
9	737
10	1027
11	1457
12	1751
13	3197
14	3337
15	5251
16	6767
17	7597
18	8251
19	13301
20	22387
21	24257
22	25807
23	32047
24	34277
25	41417
26	41917
27	48151
28	61307
29	63757
30	66887
31	68801
32	85801
33	103097
34	112751
35	136957
36	141527
37	145237
38	179747
39	180787
40	196747

[15, 26, 57, 77, 155, 187, 301, 551, 737, 1027, 1457, 1751, 3197, 3337, 5251, 6767, 7597, 8251, 13301, 22387, 24257, 25807, 32047, 34277, 41417, 41917, 48151, 61307, 63757, 66887, 68801, 85801, 103097, 112751, 136957, 141527, 145237, 179747, 180787, 196747]

cp's OEIS Frontend

A240914 Semiprimes of the form S(n) + T(n) where S(n) and T(n) are the n-th square and the n-th triangular numbers.

Table of values

List of values