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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.

A296619 The number of nonnegative walks of n steps with step sizes 1 and 2, starting at 0 and ending at 2.

Table of values

n a(n)
0 0
1 1
2 1
3 6
4 13
5 52
6 152
7 550
8 1813
9 6453
10 22427
11 80330
12 286895
13 1038931
14 3772801
15 13807294
16 50726893
17 187332517
18 694364517
19 2583714636
20 9644852364
21 36115537269
22 135607526865
23 510496492338
24 1926284451923
25 7284476707597
26 27602839227883
27 104791979218326

List of values

[0, 1, 1, 6, 13, 52, 152, 550, 1813, 6453, 22427, 80330, 286895, 1038931, 3772801, 13807294, 50726893, 187332517, 694364517, 2583714636, 9644852364, 36115537269, 135607526865, 510496492338, 1926284451923, 7284476707597, 27602839227883, 104791979218326]

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

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