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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.

A058309 a(n) = (n+3)*a(n-1) + a(n-2), with a(0)=0, a(1)=1.

Table of values

n a(n)
0 0
1 1
2 5
3 31
4 222
5 1807
6 16485
7 166657
8 1849712
9 22363201
10 292571325
11 4118361751
12 62067997590
13 997206323191
14 17014575491837
15 307259565176257
16 5854946313840720
17 117406185841990657
18 2471384848995644517
19 54487872863746170031
20 1255692460715157555230

List of values

[0, 1, 5, 31, 222, 1807, 16485, 166657, 1849712, 22363201, 292571325, 4118361751, 62067997590, 997206323191, 17014575491837, 307259565176257, 5854946313840720, 117406185841990657, 2471384848995644517, 54487872863746170031, 1255692460715157555230]

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

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