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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.

A384167 a(n) = 2^n * n! * binomial(3*n/2,n) * Sum_{k=1..n} 1/(n+2*k).

Table of values

n a(n)
1 1
2 10
3 143
4 2736
5 66009
6 1926912
7 66086271
8 2605455360
9 116123049585
10 5774107852800
11 316921177332495
12 19032668386099200
13 1241454631056114825
14 87402945316493721600
15 6606130538582006306175
16 533534147838972474163200
17 45855293972076668267481825
18 4178822478568980876361728000

List of values

[1, 10, 143, 2736, 66009, 1926912, 66086271, 2605455360, 116123049585, 5774107852800, 316921177332495, 19032668386099200, 1241454631056114825, 87402945316493721600, 6606130538582006306175, 533534147838972474163200, 45855293972076668267481825, 4178822478568980876361728000]

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

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