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.

A100512 Numerator of Sum_{k=0..n} 1/C(2*n, 2*k).

Table of values

n a(n)
0 1
1 2
2 13
3 32
4 73
5 647
6 28211
7 6080
8 18181
9 1542158
10 2786599
11 29229544
12 134354573
13 745984697
14 80530073893
15 291816652544
16 274050911261
17 258328905974
18 18079412000719
19 8574689239808
20 334365081328507
21 13707288497202919
22 52386756782140399
23 589296748617180608

List of values

[1, 2, 13, 32, 73, 647, 28211, 6080, 18181, 1542158, 2786599, 29229544, 134354573, 745984697, 80530073893, 291816652544, 274050911261, 258328905974, 18079412000719, 8574689239808, 334365081328507, 13707288497202919, 52386756782140399, 589296748617180608]

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

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