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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.

A356373 a(n) = Sum_{k=1..n} binomial(2*k, k) * A000005(k).

Table of values

n a(n)
1 2
2 14
3 54
4 264
5 768
6 4464
7 11328
8 62808
9 208668
10 947692
11 2358556
12 18583492
13 39384692
14 199851092
15 820321172
16 3825723122
17 8492935562
18 62943747362
19 133634274962
20 960713447882
21 3113744945642
22 11530140800522
23 27997002255722
24 285977831720522
25 665209651033778
26 2648883782826194

List of values

[2, 14, 54, 264, 768, 4464, 11328, 62808, 208668, 947692, 2358556, 18583492, 39384692, 199851092, 820321172, 3825723122, 8492935562, 62943747362, 133634274962, 960713447882, 3113744945642, 11530140800522, 27997002255722, 285977831720522, 665209651033778, 2648883782826194]

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

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