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.

A046224 Distinct numbers seen when writing first numerator and then denominator of central elements of 1/2-Pascal triangle.

Table of values

n a(n)
1 1
2 2
3 3
4 11
5 40
6 147
7 546
8 2046
9 7722
10 29315
11 111826
12 428298
13 1646008
14 6344366
15 24515700
16 94942620
17 368404110
18 1431985635
19 5574725970
20 21732560850
21 84828633120
22 331488081210
23 1296712152060
24 5077282282020
25 19897457591700
26 78039200913102
27 306302623291476

List of values

[1, 2, 3, 11, 40, 147, 546, 2046, 7722, 29315, 111826, 428298, 1646008, 6344366, 24515700, 94942620, 368404110, 1431985635, 5574725970, 21732560850, 84828633120, 331488081210, 1296712152060, 5077282282020, 19897457591700, 78039200913102, 306302623291476]

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

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