A251724 - cp's OEIS frontend

A251724 a(1) = 2, and for n>1: a(n) = prime(A251719(n)) * prime(A251719(n) + n - 2), where prime(n) gives the n-th prime.

n	a(n)
1	2
2	4
3	6
4	21
5	65
6	85
7	95
8	115
9	217
10	259
11	287
12	301
13	329
14	649
15	671
16	737
17	781
18	803
19	869
20	913
21	979
22	1067
23	1111
24	1133
25	1177
26	1199
27	1243
28	1703
29	1781
30	1807
31	1937
32	1963
33	2041
34	2119
35	2171
36	3043
37	3077
38	3247
39	3281
40	3349
41	3383
42	3587
43	3791
44	3859
45	3893
46	3961
47	4063
48	4097
49	4267
50	4369
51	4471
52	4573
53	4607
54	4709
55	4777
56	4811
57	5833
58	5909
59	5947
60	6023
61	6289
62	6403
63	6593
64	6631
65	6707
66	6821
67	8579

[2, 4, 6, 21, 65, 85, 95, 115, 217, 259, 287, 301, 329, 649, 671, 737, 781, 803, 869, 913, 979, 1067, 1111, 1133, 1177, 1199, 1243, 1703, 1781, 1807, 1937, 1963, 2041, 2119, 2171, 3043, 3077, 3247, 3281, 3349, 3383, 3587, 3791, 3859, 3893, 3961, 4063, 4097, 4267, 4369, 4471, 4573, 4607, 4709, 4777, 4811, 5833, 5909, 5947, 6023, 6289, 6403, 6593, 6631, 6707, 6821, 8579]

cp's OEIS Frontend

A251724 a(1) = 2, and for n>1: a(n) = prime(A251719(n)) * prime(A251719(n) + n - 2), where prime(n) gives the n-th prime.

Table of values

List of values