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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.

A379561 a(n) = A003418(n+1)*H(n), where H(n) = 1 + 1/2 + ... + 1/n is the n-th harmonic number.

Table of values

n a(n)
1 2
2 9
3 22
4 125
5 137
6 1029
7 2178
8 6849
9 7129
10 81191
11 83711
12 1118273
13 1145993
14 1171733
15 2391514
16 41421503
17 42142223
18 813635157
19 825887397
20 837527025
21 848612385
22 19761458895
23 19994251455
24 101086721625
25 102157567401
26 309561680403
27 312536252003
28 9146733078187

List of values

[2, 9, 22, 125, 137, 1029, 2178, 6849, 7129, 81191, 83711, 1118273, 1145993, 1171733, 2391514, 41421503, 42142223, 813635157, 825887397, 837527025, 848612385, 19761458895, 19994251455, 101086721625, 102157567401, 309561680403, 312536252003, 9146733078187]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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