cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A305203 Expansion of e.g.f. Product_{k>=1} (1 + H(k)*x^k), where H(k) is the k-th harmonic number.

Table of values

n a(n)
0 1
1 1
2 3
3 20
4 94
5 854
6 7638
7 77678
8 823184
9 11711952
10 162710640
11 2405290392
12 40661618688
13 701353671264
14 13592382983424
15 280431464804640
16 5835146351362560
17 130171240155651840
18 3168997587241864704
19 77082927941097660672
20 2037627154674197591040
21 56017463733173686947840

List of values

[1, 1, 3, 20, 94, 854, 7638, 77678, 823184, 11711952, 162710640, 2405290392, 40661618688, 701353671264, 13592382983424, 280431464804640, 5835146351362560, 130171240155651840, 3168997587241864704, 77082927941097660672, 2037627154674197591040, 56017463733173686947840]