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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.

A077850 Expansion of (1-x)^(-1)/(1 - 2*x - x^2 + x^3).

Table of values

n a(n)
0 1
1 3
2 8
3 19
4 44
5 100
6 226
7 509
8 1145
9 2574
10 5785
11 13000
12 29212
13 65640
14 147493
15 331415
16 744684
17 1673291
18 3759852
19 8448312
20 18983186
21 42654833
22 95844541
23 215360730
24 483911169
25 1087338528
26 2443227496
27 5489882352
28 12335653673
29 27717962203
30 62281695728
31 139945699987

List of values

[1, 3, 8, 19, 44, 100, 226, 509, 1145, 2574, 5785, 13000, 29212, 65640, 147493, 331415, 744684, 1673291, 3759852, 8448312, 18983186, 42654833, 95844541, 215360730, 483911169, 1087338528, 2443227496, 5489882352, 12335653673, 27717962203, 62281695728, 139945699987]

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

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