cp's OEIS Frontend

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.

A127620 Number of walks from (0,0) to (n,n) in the region 0 <= x-y <= 6 with the steps (1,0), (0, 1), (2,0) and (0,2).

Table of values

n a(n)
0 1
1 1
2 5
3 22
4 117
5 654
6 3843
7 22882
8 137443
9 827998
10 4995443
11 30155494
12 182083275
13 1099560942
14 6640309323
15 40101959542
16 242184540139
17 1462610652718
18 8833070227499
19 53345145429670
20 322164911643723
21 1945636121710110

List of values

[1, 1, 5, 22, 117, 654, 3843, 22882, 137443, 827998, 4995443, 30155494, 182083275, 1099560942, 6640309323, 40101959542, 242184540139, 1462610652718, 8833070227499, 53345145429670, 322164911643723, 1945636121710110]

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

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