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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.

A295113 a(n) = (1/n)*Sum_{k=0..n-1} (8*k + 9)*A295112(k)^2.

Table of values

n a(n)
1 9
2 13
3 17
4 219
5 1561
6 8169
7 39321
8 191389
9 985201
10 5430789
11 31943961
12 198471183
13 1288665177
14 8665236121
15 59922226809
16 423935337411
17 3056528058577
18 22392246851973
19 166311049602681
20 1250027314777795
21 9494339129623329
22 72784922204637153
23 562626619763553217
24 4381665416129531961
25 34354964747652467697

List of values

[9, 13, 17, 219, 1561, 8169, 39321, 191389, 985201, 5430789, 31943961, 198471183, 1288665177, 8665236121, 59922226809, 423935337411, 3056528058577, 22392246851973, 166311049602681, 1250027314777795, 9494339129623329, 72784922204637153, 562626619763553217, 4381665416129531961, 34354964747652467697]

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

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