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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.

A181546 a(n) = Sum_{k=0..floor(n/2)} C(n-k,k)^4.

Table of values

n a(n)
0 1
1 1
2 2
3 17
4 83
5 338
6 1923
7 11553
8 63028
9 359203
10 2172469
11 13026034
12 78106885
13 478415635
14 2957675956
15 18321372721
16 114301292581
17 718253640196
18 4531427831111
19 28699590926291
20 182566373639352
21 1165539703613397

List of values

[1, 1, 2, 17, 83, 338, 1923, 11553, 63028, 359203, 2172469, 13026034, 78106885, 478415635, 2957675956, 18321372721, 114301292581, 718253640196, 4531427831111, 28699590926291, 182566373639352, 1165539703613397]

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

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