A225905 - cp's OEIS frontend

A225905 Denominator of Sum_{k=1..n} 1/L(k) where L(n) is the n-th Lucas number (A000204).

n	a(n)
1	1
2	3
3	12
4	84
5	924
6	2772
7	80388
8	3778236
9	35893242
10	1471622922
11	292852961478
12	3367809056997
13	1754628518695437
14	493050613753417797
15	61138276105423806828
16	134932175364670341669396
17	481842798227237790101413116
18	154671538230943330622553610236

[1, 3, 12, 84, 924, 2772, 80388, 3778236, 35893242, 1471622922, 292852961478, 3367809056997, 1754628518695437, 493050613753417797, 61138276105423806828, 134932175364670341669396, 481842798227237790101413116, 154671538230943330622553610236]

cp's OEIS Frontend

A225905 Denominator of Sum_{k=1..n} 1/L(k) where L(n) is the n-th Lucas number (A000204).

Table of values

List of values