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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.

A270369 Expansion of g.f. (1-7*x)/(1-9*x).

Table of values

n a(n)
0 1
1 2
2 18
3 162
4 1458
5 13122
6 118098
7 1062882
8 9565938
9 86093442
10 774840978
11 6973568802
12 62762119218
13 564859072962
14 5083731656658
15 45753584909922
16 411782264189298
17 3706040377703682
18 33354363399333138
19 300189270593998242
20 2701703435345984178
21 24315330918113857602
22 218837978263024718418

List of values

[1, 2, 18, 162, 1458, 13122, 118098, 1062882, 9565938, 86093442, 774840978, 6973568802, 62762119218, 564859072962, 5083731656658, 45753584909922, 411782264189298, 3706040377703682, 33354363399333138, 300189270593998242, 2701703435345984178, 24315330918113857602, 218837978263024718418]

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

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