A379167 - cp's OEIS frontend

A379167 Table read by row, where T(n,k), n>0 and k>0, represents the smallest n-digit number that is the product of k distinct primes and is sandwiched between semiprime numbers, or -1 if no such number exists.

n	a(n)
1	5
2	-1
3	34
4	-1
5	122
6	186
7	870
8	-1
9	1042
10	1146
11	1190
12	5610
13	-1
14	10118
15	10002
16	10030
17	10230
18	39270
19	-1
20	100462
21	100158
22	100030
23	100122
24	110670
25	881790
26	-1
27	1000478
28	1000022
29	1000010
30	1000758
31	1001130
32	1009470
33	-1
34	10000202
35	10000258
36	10000002
37	10000218
38	10001670
39	10010910
40	15825810

[5, -1, 34, -1, 122, 186, 870, -1, 1042, 1146, 1190, 5610, -1, 10118, 10002, 10030, 10230, 39270, -1, 100462, 100158, 100030, 100122, 110670, 881790, -1, 1000478, 1000022, 1000010, 1000758, 1001130, 1009470, -1, 10000202, 10000258, 10000002, 10000218, 10001670, 10010910, 15825810]

cp's OEIS Frontend

A379167 Table read by row, where T(n,k), n>0 and k>0, represents the smallest n-digit number that is the product of k distinct primes and is sandwiched between semiprime numbers, or -1 if no such number exists.

Table of values

List of values