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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.

A375218 a(n) = Sum_{k=0..floor(n/2)} (k+1) * binomial(k,n-2*k)^2.

Table of values

n a(n)
0 1
1 0
2 2
3 2
4 3
5 12
6 7
7 36
8 41
9 84
10 186
11 230
12 612
13 852
14 1733
15 3198
16 5112
17 10628
18 16873
19 32562
20 57463
21 99892
22 188103
23 319188
24 591982
25 1040076
26 1849352
27 3351304
28 5854119
29 10610416
30 18707180
31 33370938
32 59618393
33 105291208
34 188572347
35 333462928
36 593859439
37 1055432400
38 1870161060

List of values

[1, 0, 2, 2, 3, 12, 7, 36, 41, 84, 186, 230, 612, 852, 1733, 3198, 5112, 10628, 16873, 32562, 57463, 99892, 188103, 319188, 591982, 1040076, 1849352, 3351304, 5854119, 10610416, 18707180, 33370938, 59618393, 105291208, 188572347, 333462928, 593859439, 1055432400, 1870161060]

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

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