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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.

A192446 Number of lattice paths from (0,0) to (n,n) using steps (1,0), (3,0), (0,1), (0,3).

Table of values

n a(n)
0 1
1 2
2 6
3 30
4 154
5 768
6 3906
7 20232
8 105750
9 556328
10 2943432
11 15646932
12 83500126
13 447057380
14 2400249624
15 12918250836
16 69674241654
17 376489511460
18 2037768450480
19 11045915485740
20 59955446568276
21 325821729044784
22 1772588671356204
23 9653187691115640
24 52617711157401186
25 287051310425050668

List of values

[1, 2, 6, 30, 154, 768, 3906, 20232, 105750, 556328, 2943432, 15646932, 83500126, 447057380, 2400249624, 12918250836, 69674241654, 376489511460, 2037768450480, 11045915485740, 59955446568276, 325821729044784, 1772588671356204, 9653187691115640, 52617711157401186, 287051310425050668]

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

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