A013638 - cp's OEIS frontend

A013638 a(n) = prevprime(n)*nextprime(n).

n	a(n)
3	10
4	15
5	21
6	35
7	55
8	77
9	77
10	77
11	91
12	143
13	187
14	221
15	221
16	221
17	247
18	323
19	391
20	437
21	437
22	437
23	551
24	667
25	667
26	667
27	667
28	667
29	713
30	899
31	1073
32	1147
33	1147
34	1147
35	1147
36	1147
37	1271
38	1517
39	1517
40	1517
41	1591
42	1763
43	1927

[10, 15, 21, 35, 55, 77, 77, 77, 91, 143, 187, 221, 221, 221, 247, 323, 391, 437, 437, 437, 551, 667, 667, 667, 667, 667, 713, 899, 1073, 1147, 1147, 1147, 1147, 1147, 1271, 1517, 1517, 1517, 1591, 1763, 1927]

cp's OEIS Frontend

A013638 a(n) = prevprime(n)*nextprime(n).

Table of values

List of values