A128044 - cp's OEIS frontend

A128044 a(n) = numerator of b(n), where b(1) = 1, b(n) = Sum_{k=1..n-1} b(n-k) * H(k); H(k) = Sum_{j=1..k} 1/j, the k-th harmonic number.

n	a(n)
1	1
2	1
3	5
4	35
5	27
6	156
7	25951
8	419681
9	646379
10	13439609
11	5544403
12	56359019
13	109370096651
14	218981057573
15	1073115579569
16	334684898286103
17	8505202310547841
18	515483074900523
19	712333151156230489

[1, 1, 5, 35, 27, 156, 25951, 419681, 646379, 13439609, 5544403, 56359019, 109370096651, 218981057573, 1073115579569, 334684898286103, 8505202310547841, 515483074900523, 712333151156230489]

cp's OEIS Frontend

A128044 a(n) = numerator of b(n), where b(1) = 1, b(n) = Sum_{k=1..n-1} b(n-k) * H(k); H(k) = Sum_{j=1..k} 1/j, the k-th harmonic number.

Table of values

List of values