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.

A218274 Number of n-step paths from (0,0) to (1,0) where all diagonal, vertical and horizontal steps are allowed.

Table of values

n a(n)
0 0
1 1
2 4
3 27
4 168
5 1140
6 7800
7 54845
8 390320
9 2815344
10 20494320
11 150442908
12 1111782672
13 8264558016
14 61743361680
15 463306724595
16 3489942222624
17 26378657835816
18 199991245341888
19 1520403553182800
20 11587257160313120
21 88506896001503616
22 677426230547667744

List of values

[0, 1, 4, 27, 168, 1140, 7800, 54845, 390320, 2815344, 20494320, 150442908, 1111782672, 8264558016, 61743361680, 463306724595, 3489942222624, 26378657835816, 199991245341888, 1520403553182800, 11587257160313120, 88506896001503616, 677426230547667744]

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

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