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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.

A128322 Column 1 of triangle A128320; a(n) = A128321(n) + 2n*A128321(n-1), where A128321 is column 0 of triangle A128320.

Table of values

n a(n)
0 1
1 3
2 8
3 41
4 234
5 1602
6 11976
7 98541
8 866942
9 8139602
10 80559456
11 837863578
12 9098447188
13 102867879636
14 1206145137840
15 14632952210685
16 183197674060470
17 2362463132266770
18 31320354882679440
19 426245968192108590

List of values

[1, 3, 8, 41, 234, 1602, 11976, 98541, 866942, 8139602, 80559456, 837863578, 9098447188, 102867879636, 1206145137840, 14632952210685, 183197674060470, 2362463132266770, 31320354882679440, 426245968192108590]

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

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