A349478 - cp's OEIS frontend

A349478 a(n) is the least number k such that the sequence of elements of the continued fraction of the harmonic mean of the divisors of k is palindromic with length n, or -1 if no such k exists.

n	a(n)
1	1
2	15
3	8
4	545
5	21
6	1131
7	16
8	98124
9	28676
10	1109305
11	28672
12	16837500
13	1231932
14	477021580
15	6129711
16	734420331
17	441972042
18	4343866215
19	42741916965
20	96692841558
21	2193739177

[1, 15, 8, 545, 21, 1131, 16, 98124, 28676, 1109305, 28672, 16837500, 1231932, 477021580, 6129711, 734420331, 441972042, 4343866215, 42741916965, 96692841558, 2193739177]

cp's OEIS Frontend

A349478 a(n) is the least number k such that the sequence of elements of the continued fraction of the harmonic mean of the divisors of k is palindromic with length n, or -1 if no such k exists.

Table of values

List of values