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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.

A191684 Number of lattice paths from (0,0) to (n,n) using steps (0,1), (0,2), (1,0), (2,2).

Table of values

n a(n)
0 1
1 2
2 10
3 46
4 233
5 1196
6 6274
7 33292
8 178378
9 962616
10 5224965
11 28494124
12 156000816
13 856903772
14 4720235840
15 26064910068
16 144236627991
17 799671246842
18 4440913771641
19 24699098156578
20 137553727513369
21 766990846033320
22 4281404671954689
23 23923170440346544

List of values

[1, 2, 10, 46, 233, 1196, 6274, 33292, 178378, 962616, 5224965, 28494124, 156000816, 856903772, 4720235840, 26064910068, 144236627991, 799671246842, 4440913771641, 24699098156578, 137553727513369, 766990846033320, 4281404671954689, 23923170440346544]

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

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