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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.

A350669 Numerators of Sum_{j=0..n} 1/(2*j+1), for n >= 0.

Table of values

n a(n)
0 1
1 4
2 23
3 176
4 563
5 6508
6 88069
7 91072
8 1593269
9 31037876
10 31730711
11 744355888
12 3788707301
13 11552032628
14 340028535787
15 10686452707072
16 10823198495797
17 10952130239452
18 409741429887649
19 414022624965424
20 17141894231615609
21 743947082888833412
22 750488463554668427
23 35567319917031991744
24 250947670863258378883
25 252846595191840484708
26 13497714685925233086599

List of values

[1, 4, 23, 176, 563, 6508, 88069, 91072, 1593269, 31037876, 31730711, 744355888, 3788707301, 11552032628, 340028535787, 10686452707072, 10823198495797, 10952130239452, 409741429887649, 414022624965424, 17141894231615609, 743947082888833412, 750488463554668427, 35567319917031991744, 250947670863258378883, 252846595191840484708, 13497714685925233086599]

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