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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.

A343672 a(0) = 1; a(n) = 2 * n * a(n-1) + Sum_{k=0..n-1} binomial(n,k) * a(k).

Table of values

n a(n)
0 1
1 3
2 19
3 181
4 2299
5 36501
6 695427
7 15457709
8 392672651
9 11221959685
10 356339728243
11 12446649786429
12 474273933636411
13 19577992095770837
14 870345573347448803
15 41455153171478627533
16 2106173029315813515883
17 113694251997087087941925
18 6498401704686168598548435
19 392062852538564346207533789

List of values

[1, 3, 19, 181, 2299, 36501, 695427, 15457709, 392672651, 11221959685, 356339728243, 12446649786429, 474273933636411, 19577992095770837, 870345573347448803, 41455153171478627533, 2106173029315813515883, 113694251997087087941925, 6498401704686168598548435, 392062852538564346207533789]

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

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