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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.

A382841 a(n) = Sum_{k=0..floor(n/2)} (binomial(n,k) * binomial(n-k,k))^2.

Table of values

n a(n)
0 1
1 1
2 5
3 37
4 181
5 1301
6 9401
7 65465
8 498037
9 3796021
10 29221705
11 230396585
12 1828448425
13 14651160265
14 118544522045
15 965075143037
16 7907605360757
17 65162569952245
18 539515760866889
19 4486877961224297
20 37463151704756281
21 313909383754331801
22 2638892573249746445
23 22249830926517611917

List of values

[1, 1, 5, 37, 181, 1301, 9401, 65465, 498037, 3796021, 29221705, 230396585, 1828448425, 14651160265, 118544522045, 965075143037, 7907605360757, 65162569952245, 539515760866889, 4486877961224297, 37463151704756281, 313909383754331801, 2638892573249746445, 22249830926517611917]

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

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