A057438 - cp's OEIS frontend

A057438 a(1) = 1; a(n+1) = (Product_{k = 1..n} [a(k)]) * (Sum_{j = 1..n} [1/a(j)]).

n	a(n)
1	1
2	1
3	2
4	5
5	27
6	739
7	546391
8	298543324411
9	89128116550480609893151
10	7943821159836055611643954282977557048699079331
11	63104294619459055797454850600852928915607093463575707111291209057699988334565551829102647591

[1, 1, 2, 5, 27, 739, 546391, 298543324411, 89128116550480609893151, 7943821159836055611643954282977557048699079331, 63104294619459055797454850600852928915607093463575707111291209057699988334565551829102647591]

cp's OEIS Frontend

A057438 a(1) = 1; a(n+1) = (Product_{k = 1..n} [a(k)]) * (Sum_{j = 1..n} [1/a(j)]).

Table of values

List of values