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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.

A274783 Diagonal of the rational function 1/(1 - (w*x*y*z + w*x*y + w*x*z + w*y*z + x*y*z)).

Table of values

n a(n)
0 1
1 1
2 1
3 25
4 121
5 361
6 3361
7 24361
8 116425
9 790441
10 6060121
11 36888721
12 238815721
13 1760983225
14 11968188961
15 79763351305
16 570661612585
17 4040282139625
18 27901708614985
19 198090585115105
20 1420583920034161
21 10056659775872161
22 71730482491962361
23 517012699162717825
24 3713833648541268121

List of values

[1, 1, 1, 25, 121, 361, 3361, 24361, 116425, 790441, 6060121, 36888721, 238815721, 1760983225, 11968188961, 79763351305, 570661612585, 4040282139625, 27901708614985, 198090585115105, 1420583920034161, 10056659775872161, 71730482491962361, 517012699162717825, 3713833648541268121]

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

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