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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.

A121354 a(n) = (3*n-1)*a(n-1) - a(n-2).

Table of values

n a(n)
0 0
1 1
2 5
3 39
4 424
5 5897
6 99825
7 1990603
8 45684044
9 1185794541
10 34342357645
11 1097769650099
12 38387595395820
13 1457630855391061
14 59724477475637681
15 2626419378072666903
16 123381986291939706760
17 6166472895218912671097
18 326699681460310431861381
19 18289015688882165271566239

List of values

[0, 1, 5, 39, 424, 5897, 99825, 1990603, 45684044, 1185794541, 34342357645, 1097769650099, 38387595395820, 1457630855391061, 59724477475637681, 2626419378072666903, 123381986291939706760, 6166472895218912671097, 326699681460310431861381, 18289015688882165271566239]

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

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